The number 8
Numeral systems
Binary: 1000
Septimal (base 7): 11
Octal: 10
Hexadecimal: 8
Base 24: 8
Factorization
8 = 2 × 2 × 2
8 has 4 divisors: 1, 2, 4, 8
Sum of all divisors other than 8:
78 = 2 3
Sums & differences
Sum of 2 squares: 8 = 22 + 22
Goldbach conjecture: 8 = 5 + 3
Characteristics
8 is a Fibonacci number
8 is a octogonal number
8 is a palindromic number in decimal system
8 is a palindromic number in septimal system (11)
8 is a Layland number, 8 = 22 + 22
Related primes
The 8th prime number is:
19Previous prime number:
7 — Next prime number:
11
