30656 has 14 divisors (see below), whose sum is σ = 60960. Its totient is φ = 15296.

The previous prime is 30649. The next prime is 30661. The reversal of 30656 is 65603.

It is a congruent number.

It is an unprimeable number.

30656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176 + ... + 303.

2³⁰⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

30656 is a deficient number, since it is larger than the sum of its proper divisors (30304).

30656 is an equidigital number, since it uses as much as digits as its factorization.

30656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 30656 is about 175.0885490259. The cubic root of 30656 is about 31.2971767435.

It can be divided in two parts, 30 and 656, that added together give a palindrome (686).

The spelling of 30656 in words is "thirty thousand, six hundred fifty-six".