257260938 has 32 divisors (see below), whose sum is σ = 566868672. Its totient is φ = 77184000.

The previous prime is 257260919. The next prime is 257260961. The reversal of 257260938 is 839062752.

It is a self number, because there is not a number n which added to its sum of digits gives 257260938.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12631 + ... + 25962.

It is an arithmetic number, because the mean of its divisors is an integer number (17714646).

Almost surely, 2^257260938 is an apocalyptic number.

257260938 is an abundant number, since it is smaller than the sum of its proper divisors (309607734).

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

257260938 is a wasteful number, since it uses less digits than its factorization.

257260938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38710.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 257260938 is about 16039.3559097615. The cubic root of 257260938 is about 636.0012212705.

The spelling of 257260938 in words is "two hundred fifty-seven million, two hundred sixty thousand, nine hundred thirty-eight".