256908 has 24 divisors (see below), whose sum is σ = 609280. Its totient is φ = 84240.

The previous prime is 256903. The next prime is 256931. The reversal of 256908 is 809652.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256908.

It is not an unprimeable number, because it can be changed into a prime (256901) by changing a digit.

256908 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813 + ... + 1083.

2²⁵⁶⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

256908 is an abundant number, since it is smaller than the sum of its proper divisors (352372).

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

256908 is a wasteful number, since it uses less digits than its factorization.

256908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 256908 is about 506.8609276715. The cubic root of 256908 is about 63.5710243390.

The spelling of 256908 in words is "two hundred fifty-six thousand, nine hundred eight".