256455056 has 40 divisors (see below), whose sum is σ = 583754304. Its totient is φ = 107602560.

The previous prime is 256455049. The next prime is 256455061. The reversal of 256455056 is 650554652.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53756 + ... + 58331.

Almost surely, 2^256455056 is an apocalyptic number.

256455056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

256455056 is an abundant number, since it is smaller than the sum of its proper divisors (327299248).

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

256455056 is a wasteful number, since it uses less digits than its factorization.

256455056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112119 (or 112113 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 256455056 is about 16014.2141861535. The cubic root of 256455056 is about 635.3364253623.

The spelling of 256455056 in words is "two hundred fifty-six million, four hundred fifty-five thousand, fifty-six".