257831328 has 48 divisors (see below), whose sum is σ = 686097216. Its totient is φ = 84764160.

The previous prime is 257831303. The next prime is 257831339. The reversal of 257831328 is 823138752.

257831328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11388 + ... + 25403.

It is an arithmetic number, because the mean of its divisors is an integer number (14293692).

Almost surely, 2^257831328 is an apocalyptic number.

It is an amenable number.

257831328 is an abundant number, since it is smaller than the sum of its proper divisors (428265888).

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

257831328 is a wasteful number, since it uses less digits than its factorization.

257831328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36877 (or 36869 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 257831328 is about 16057.1270157522. The cubic root of 257831328 is about 636.4709142382.

The spelling of 257831328 in words is "two hundred fifty-seven million, eight hundred thirty-one thousand, three hundred twenty-eight".