256568 has 16 divisors (see below), whose sum is σ = 518280. Its totient is φ = 118368.

The previous prime is 256567. The next prime is 256577. The reversal of 256568 is 865652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256561) 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, 1130 + ... + 1337.

2²⁵⁶⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

256568 is an abundant number, since it is smaller than the sum of its proper divisors (261712).

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

256568 is a wasteful number, since it uses less digits than its factorization.

256568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486 (or 2482 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 256568 is about 506.5254189081. The cubic root of 256568 is about 63.5429680046.

The spelling of 256568 in words is "two hundred fifty-six thousand, five hundred sixty-eight".