256883556 has 12 divisors (see below), whose sum is σ = 599394992. Its totient is φ = 85627848.

The previous prime is 256883551. The next prime is 256883593. The reversal of 256883556 is 655388652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×256883556² = 131978322686410272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256883551) 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, 10703470 + ... + 10703493.

Almost surely, 2^256883556 is an apocalyptic number.

It is an amenable number.

256883556 is an abundant number, since it is smaller than the sum of its proper divisors (342511436).

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

256883556 is a wasteful number, since it uses less digits than its factorization.

256883556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21406970 (or 21406968 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The square root of 256883556 is about 16027.5873418303. The cubic root of 256883556 is about 635.6900807973.

The spelling of 256883556 in words is "two hundred fifty-six million, eight hundred eighty-three thousand, five hundred fifty-six".