257668964 has 12 divisors (see below), whose sum is σ = 515337984. Its totient is φ = 110429544.

The previous prime is 257668963. The next prime is 257668979. The reversal of 257668964 is 469866752.

257668964 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (257668963) 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, 4601204 + ... + 4601259.

It is an arithmetic number, because the mean of its divisors is an integer number (42944832).

Almost surely, 2^257668964 is an apocalyptic number.

It is an amenable number.

257668964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

257668964 is a wasteful number, since it uses less digits than its factorization.

257668964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9202474 (or 9202472 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 53.

The square root of 257668964 is about 16052.0703960579. The cubic root of 257668964 is about 636.3372846750.

The spelling of 257668964 in words is "two hundred fifty-seven million, six hundred sixty-eight thousand, nine hundred sixty-four".