256438588 has 12 divisors (see below), whose sum is σ = 512877232. Its totient is φ = 109902240.

The previous prime is 256438583. The next prime is 256438631. The reversal of 256438588 is 885834652.

256438588 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256438583) 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, 4579233 + ... + 4579288.

Almost surely, 2^256438588 is an apocalyptic number.

256438588 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256438588 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256438588 is a wasteful number, since it uses less digits than its factorization.

256438588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9158532 (or 9158530 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 49.

The square root of 256438588 is about 16013.7000096792. The cubic root of 256438588 is about 635.3228259109.

The spelling of 256438588 in words is "two hundred fifty-six million, four hundred thirty-eight thousand, five hundred eighty-eight".