7998 (number)
7,998 (seven thousand nine hundred ninetyeight) is an even fourdigits composite number following 7997 and preceding 7999. In scientific notation, it is written as 7.998 × 10^{3}. The sum of its digits is 33. It has a total of 4 prime factors and 16 positive divisors. There are 2,520 positive integers (up to 7998) that are relatively prime to 7998.
Basic properties
 Is Prime? No
 Number parity Even
 Number length 4
 Sum of Digits 33
 Digital Root 6
Name
Short name  7 thousand 998 

Full name  seven thousand nine hundred ninetyeight 
Notation
Scientific notation  7.998 × 10^{3} 

Engineering notation  7.998 × 10^{3} 
Prime Factorization of 7998
Prime Factorization 2 × 3 × 31 × 43
Composite numberω(n)  Distinct Factors  4  Total number of distinct prime factors 

Ω(n)  Total Factors  4  Total number of prime factors 
rad(n)  Radical  7998  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  1  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 7,998 is 2 × 3 × 31 × 43. Since it has a total of 4 prime factors, 7,998 is a composite number.
Divisors of 7998
16 divisors
τ(n)  Total Divisors  16  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  16896  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  8898  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  1056  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  89.431538061245  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  7.5738636363636  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 7,998 can be divided by 16 positive divisors (out of which 8 are even, and 8 are odd). The sum of these divisors (counting 7,998) is 16,896, the average is 1,056.
Other Arithmetic Functions (n = 7998)
φ(n)  Euler Totient  2520  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  210  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 1012  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 2,520 positive integers (less than 7,998) that are coprime with 7,998. And there are approximately 1,012 prime numbers less than or equal to 7,998.
Divisibility of 7998
m  2  3  4  5  6  7  8  9 

n mod m  0  0  2  3  0  4  6  6 
The number 7,998 is divisible by 2, 3 and 6.
Classification of 7998
By Arithmetic functions
 Arithmetic
 Abundant
Expressible via specific sums
 Polite
 Nonhypotenuse
By Powers
 Square Free
Base conversion (7998)
Base  System  Value 

2  Binary  1111100111110 
3  Ternary  101222020 
4  Quaternary  1330332 
5  Quinary  223443 
6  Senary  101010 
8  Octal  17476 
10  Decimal  7998 
12  Duodecimal  4766 
16  Hexadecimal  1f3e 
20  Vigesimal  jji 
36  Base36  666 
Basic calculations (n = 7998)
Multiplication
n×yn×2  15996 

n×3  23994 
n×4  31992 
n×5  39990 
Division
n÷yn÷2  3999.000 

n÷3  2666.000 
n÷4  1999.500 
n÷5  1599.600 
Exponentiation
n^{y}n^{2}  63968004 

n^{3}  511616095992 
n^{4}  4091905535744016 
n^{5}  32727060474880639968 
Nth Root
^{y}√n^{2}√n  89.431538061245 

^{3}√n  19.998333194425 
^{4}√n  9.4568249461035 
^{5}√n  6.0338745975529 
7998 as geometric shapes
Circle
Radius = nDiameter  15996 

Circumference  50252.916086822 
Area  200961411.4312 
Sphere
Radius = nVolume  2143052491502.3 

Surface area  803845645.72481 
Circumference  50252.916086822 
Square
Length = nPerimeter  31992 

Area  63968004 
Diagonal  11310.88007186 
Cube
Length = nSurface area  383808024 

Volume  511616095992 
Space diagonal  13852.942358936 
Equilateral Triangle
Length = nPerimeter  23994 

Area  27698958.246692 
Altitude  6926.4711794679 
Triangular Pyramid
Length = nSurface area  110795832.98677 

Volume  60294535140.022 
Height  6530.33965426 
Cryptographic Hash Functions
md5  27ef345422b300b5bc84817e0f83ca8b 

sha1  e4b7d2bd37d753ad611ccb18895d1969729926cf 
sha256  559607effd36c95debae36012e4e588ba6c7b0079cc024dc1ffcc240fdbafdae 
sha512  f5347ac89dcb45e6f9e4f9d509b3a3ebeab0abf04491a3a427ca7fd0ac944df0136faae7a4b934ca9b490adf71493c2c4d423898cf3af0f05f86162658fa6031 
ripemd160  370758362a63c52276156c866f170faa73863271 