257044928 has 28 divisors (see below), whose sum is σ = 582942192. Its totient is φ = 110161920.

The previous prime is 257044903. The next prime is 257044933. The reversal of 257044928 is 829440752.

It is a tau number, because it is divible by the number of its divisors (28).

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, 286433 + ... + 287328.

It is an arithmetic number, because the mean of its divisors is an integer number (20819364).

Almost surely, 2^257044928 is an apocalyptic number.

257044928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

257044928 is an abundant number, since it is smaller than the sum of its proper divisors (325897264).

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

257044928 is an equidigital number, since it uses as much as digits as its factorization.

257044928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573780 (or 573770 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 257044928 is about 16032.6207464656. The cubic root of 257044928 is about 635.8231645809.

The spelling of 257044928 in words is "two hundred fifty-seven million, forty-four thousand, nine hundred twenty-eight".