256628608 has 16 divisors (see below), whose sum is σ = 511252560. Its totient is φ = 128314240.

The previous prime is 256628587. The next prime is 256628639. The reversal of 256628608 is 806826652.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002328 + ... + 1002583.

It is an arithmetic number, because the mean of its divisors is an integer number (31953285).

Almost surely, 2^256628608 is an apocalyptic number.

It is an amenable number.

256628608 is a deficient number, since it is larger than the sum of its proper divisors (254623952).

256628608 is an equidigital number, since it uses as much as digits as its factorization.

256628608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004925 (or 2004913 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 256628608 is about 16019.6319558222. The cubic root of 256628608 is about 635.4797110842.

The spelling of 256628608 in words is "two hundred fifty-six million, six hundred twenty-eight thousand, six hundred eight".