257872028 has 12 divisors (see below), whose sum is σ = 475027560. Its totient is φ = 122149872.

The previous prime is 257872019. The next prime is 257872039. The reversal of 257872028 is 820278752.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696451 + ... + 1696602.

It is an arithmetic number, because the mean of its divisors is an integer number (39585630).

Almost surely, 2^257872028 is an apocalyptic number.

It is an amenable number.

257872028 is a deficient number, since it is larger than the sum of its proper divisors (217155532).

257872028 is a wasteful number, since it uses less digits than its factorization.

257872028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393076 (or 3393074 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 257872028 is about 16058.3943157465. The cubic root of 257872028 is about 636.5044025443.

The spelling of 257872028 in words is "two hundred fifty-seven million, eight hundred seventy-two thousand, twenty-eight".