256047568 has 20 divisors (see below), whose sum is σ = 566962720. Its totient is φ = 109734624.

The previous prime is 256047563. The next prime is 256047577. The reversal of 256047568 is 865740652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256047563) 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, 1142958 + ... + 1143181.

It is an arithmetic number, because the mean of its divisors is an integer number (28348136).

Almost surely, 2^256047568 is an apocalyptic number.

256047568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256047568 is an abundant number, since it is smaller than the sum of its proper divisors (310915152).

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

256047568 is a wasteful number, since it uses less digits than its factorization.

256047568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286154 (or 2286148 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 256047568 is about 16001.4864309538. The cubic root of 256047568 is about 634.9997462127. Note that the first 3 decimals are identical.

The spelling of 256047568 in words is "two hundred fifty-six million, forty-seven thousand, five hundred sixty-eight".