257068904 has 8 divisors (see below), whose sum is σ = 482004210. Its totient is φ = 128534448.

The previous prime is 257068901. The next prime is 257068909. The reversal of 257068904 is 409860752.

It can be written as a sum of positive squares in only one way, i.e., 200788900 + 56280004 = 14170^2 + 7502^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×257068904² = 132168842807522432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257068901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16066799 + ... + 16066814.

Almost surely, 2^257068904 is an apocalyptic number.

It is an amenable number.

257068904 is a deficient number, since it is larger than the sum of its proper divisors (224935306).

257068904 is a wasteful number, since it uses less digits than its factorization.

257068904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32133619 (or 32133615 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 257068904 is about 16033.3684545700. The cubic root of 257068904 is about 635.8429328789.

The spelling of 257068904 in words is "two hundred fifty-seven million, sixty-eight thousand, nine hundred four".