256764256 has 48 divisors (see below), whose sum is σ = 578993184. Its totient is φ = 109799424.

The previous prime is 256764253. The next prime is 256764257. The reversal of 256764256 is 652467652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256764251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131866 + ... + 133798.

It is an arithmetic number, because the mean of its divisors is an integer number (12062358).

Almost surely, 2^256764256 is an apocalyptic number.

It is an amenable number.

256764256 is an abundant number, since it is smaller than the sum of its proper divisors (322228928).

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

256764256 is a wasteful number, since it uses less digits than its factorization.

256764256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543 (or 2535 counting only the distinct ones).

The product of its digits is 604800, while the sum is 43.

The square root of 256764256 is about 16023.8652016297. The cubic root of 256764256 is about 635.5916580322.

The spelling of 256764256 in words is "two hundred fifty-six million, seven hundred sixty-four thousand, two hundred fifty-six".