-30 is an even number.
-30 is a Harshad number, which means it is divisible by the sum of its digits (3 + 0 = 3, and -30 is divisible by 3).
In binary, -30 is represented as 1111111111111111111111111111111111111111111111111111111111100010.
In hex, -30 is represented as ffffffffffffffe2.