8 is an even number.
8 is a palindrome.
8 is a Harshad number, which means it is divisible by the sum of its digits (8 = 8, and 8 is divisible by 8).
In binary, 8 is represented as 1000.
In hex, 8 is represented as 8.
8 is an Armstrong (or Narcissistic) number, which means it is the sum of its own digits each raised to the power of the number of digits.
8 is the 6th Fibonacci number.
Prime factorization of 8: 23.