257490312 has 32 divisors (see below), whose sum is σ = 644280480. Its totient is φ = 85756160.

The previous prime is 257490301. The next prime is 257490323. The reversal of 257490312 is 213094752.

It is an interprime number because it is at equal distance from previous prime (257490301) and next prime (257490323).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28723 + ... + 36605.

It is an arithmetic number, because the mean of its divisors is an integer number (20133765).

Almost surely, 2^257490312 is an apocalyptic number.

It is an amenable number.

257490312 is an abundant number, since it is smaller than the sum of its proper divisors (386790168).

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

257490312 is a wasteful number, since it uses less digits than its factorization.

257490312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9253 (or 9249 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 257490312 is about 16046.5046661259. The cubic root of 257490312 is about 636.1901848063.

The spelling of 257490312 in words is "two hundred fifty-seven million, four hundred ninety thousand, three hundred twelve".