30664256 has 28 divisors (see below), whose sum is σ = 69543168. Its totient is φ = 13141632.

The previous prime is 30664237. The next prime is 30664259. The reversal of 30664256 is 65246603.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (30664259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33776 + ... + 34671.

Almost surely, 2^30664256 is an apocalyptic number.

It is an amenable number.

30664256 is an abundant number, since it is smaller than the sum of its proper divisors (38878912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30664256 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 30664256 = (63626405)₉.

30664256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68466 (or 68456 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 30664256 is about 5537.5315800454. The cubic root of 30664256 is about 312.9998605000. Note that the first 3 decimals are identical.

The spelling of 30664256 in words is "thirty million, six hundred sixty-four thousand, two hundred fifty-six".