257671956 has 12 divisors (see below), whose sum is σ = 601234592. Its totient is φ = 85890648.

The previous prime is 257671937. The next prime is 257671961. The reversal of 257671956 is 659176752.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10736320 + ... + 10736343.

Almost surely, 2^257671956 is an apocalyptic number.

It is an amenable number.

257671956 is an abundant number, since it is smaller than the sum of its proper divisors (343562636).

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

257671956 is a wasteful number, since it uses less digits than its factorization.

257671956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21472670 (or 21472668 counting only the distinct ones).

The product of its digits is 793800, while the sum is 48.

The square root of 257671956 is about 16052.1635924881. The cubic root of 257671956 is about 636.3397476722.

The spelling of 257671956 in words is "two hundred fifty-seven million, six hundred seventy-one thousand, nine hundred fifty-six".