257870564 has 24 divisors (see below), whose sum is σ = 518914368. Its totient is φ = 109836000.

The previous prime is 257870563. The next prime is 257870567. The reversal of 257870564 is 465078752.

It is not an unprimeable number, because it can be changed into a prime (257870563) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23687 + ... + 32814.

It is an arithmetic number, because the mean of its divisors is an integer number (21621432).

Almost surely, 2^257870564 is an apocalyptic number.

It is an amenable number.

257870564 is an abundant number, since it is smaller than the sum of its proper divisors (261043804).

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

257870564 is a wasteful number, since it uses less digits than its factorization.

257870564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56675 (or 56673 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

The square root of 257870564 is about 16058.3487320459. The cubic root of 257870564 is about 636.5031980137.

The spelling of 257870564 in words is "two hundred fifty-seven million, eight hundred seventy thousand, five hundred sixty-four".