257606872 has 16 divisors (see below), whose sum is σ = 483197400. Its totient is φ = 128754240.

The previous prime is 257606849. The next prime is 257606879. The reversal of 257606872 is 278606752.

It is a super-2 number, since 2×257606872² = 132722601003248768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257606879) 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, 25972 + ... + 34492.

Almost surely, 2^257606872 is an apocalyptic number.

It is an amenable number.

257606872 is a deficient number, since it is larger than the sum of its proper divisors (225590528).

257606872 is a wasteful number, since it uses less digits than its factorization.

257606872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12306 (or 12302 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 257606872 is about 16050.1361987991. The cubic root of 257606872 is about 636.2861665941.

The spelling of 257606872 in words is "two hundred fifty-seven million, six hundred six thousand, eight hundred seventy-two".