-72 is an even number.
-72 is a Harshad number, which means it is divisible by the sum of its digits (7 + 2 = 9, and -72 is divisible by 9).
In binary, -72 is represented as 1111111111111111111111111111111111111111111111111111111110111000.
In hex, -72 is represented as ffffffffffffffb8.