256634256 has 20 divisors (see below), whose sum is σ = 662971952. Its totient is φ = 85544736.

The previous prime is 256634249. The next prime is 256634263. The reversal of 256634256 is 652436652.

256634256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256634249) and next prime (256634263).

It is a super-2 number, since 2×256634256² = 131722282705347072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2673226 + ... + 2673321.

Almost surely, 2^256634256 is an apocalyptic number.

It is an amenable number.

256634256 is an abundant number, since it is smaller than the sum of its proper divisors (406337696).

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

256634256 is a wasteful number, since it uses less digits than its factorization.

256634256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5346558 (or 5346552 counting only the distinct ones).

The product of its digits is 259200, while the sum is 39.

The square root of 256634256 is about 16019.8082385527. The cubic root of 256634256 is about 635.4843730263.

The spelling of 256634256 in words is "two hundred fifty-six million, six hundred thirty-four thousand, two hundred fifty-six".