257915768 has 16 divisors (see below), whose sum is σ = 527555160. Its totient is φ = 117234400.

The previous prime is 257915761. The next prime is 257915771. The reversal of 257915768 is 867519752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257915761) 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, 1465343 + ... + 1465518.

Almost surely, 2^257915768 is an apocalyptic number.

It is an amenable number.

257915768 is an abundant number, since it is smaller than the sum of its proper divisors (269639392).

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

257915768 is a wasteful number, since it uses less digits than its factorization.

257915768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930878 (or 2930874 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 50.

The square root of 257915768 is about 16059.7561625325. The cubic root of 257915768 is about 636.5403882602.

The spelling of 257915768 in words is "two hundred fifty-seven million, nine hundred fifteen thousand, seven hundred sixty-eight".