257938792 has 16 divisors (see below), whose sum is σ = 489758400. Its totient is φ = 127336560.

The previous prime is 257938781. The next prime is 257938823. The reversal of 257938792 is 297839752.

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, 203434 + ... + 204697.

It is an arithmetic number, because the mean of its divisors is an integer number (30609900).

Almost surely, 2^257938792 is an apocalyptic number.

It is an amenable number.

257938792 is a deficient number, since it is larger than the sum of its proper divisors (231819608).

257938792 is a wasteful number, since it uses less digits than its factorization.

257938792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408216 (or 408212 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The square root of 257938792 is about 16060.4729693742. The cubic root of 257938792 is about 636.5593289010.

The spelling of 257938792 in words is "two hundred fifty-seven million, nine hundred thirty-eight thousand, seven hundred ninety-two".