256565268 has 36 divisors (see below), whose sum is σ = 659177428. Its totient is φ = 84119040.

The previous prime is 256565251. The next prime is 256565279. The reversal of 256565268 is 862565652.

256565268 is a `hidden beast` number, since 2 + 565 + 65 + 26 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12830724 + 243734544 = 3582^2 + 15612^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56221 + ... + 60612.

Almost surely, 2^256565268 is an apocalyptic number.

It is an amenable number.

256565268 is an abundant number, since it is smaller than the sum of its proper divisors (402612160).

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

256565268 is a wasteful number, since it uses less digits than its factorization.

256565268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116904 (or 116899 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 256565268 is about 16017.6548845329. The cubic root of 256565268 is about 635.4274246339.

The spelling of 256565268 in words is "two hundred fifty-six million, five hundred sixty-five thousand, two hundred sixty-eight".