256732836 has 48 divisors (see below), whose sum is σ = 614779200. Its totient is φ = 83356672.

The previous prime is 256732829. The next prime is 256732843. The reversal of 256732836 is 638237652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256732829) and next prime (256732843).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78400 + ... + 81608.

It is an arithmetic number, because the mean of its divisors is an integer number (12807900).

Almost surely, 2^256732836 is an apocalyptic number.

It is an amenable number.

256732836 is an abundant number, since it is smaller than the sum of its proper divisors (358046364).

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

256732836 is a wasteful number, since it uses less digits than its factorization.

256732836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388 (or 3386 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 256732836 is about 16022.8847589939. The cubic root of 256732836 is about 635.5657313906.

The spelling of 256732836 in words is "two hundred fifty-six million, seven hundred thirty-two thousand, eight hundred thirty-six".