257319928 has 8 divisors (see below), whose sum is σ = 482474880. Its totient is φ = 128659960.

The previous prime is 257319919. The next prime is 257319943. The reversal of 257319928 is 829913752.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16082488 + ... + 16082503.

It is an arithmetic number, because the mean of its divisors is an integer number (60309360).

Almost surely, 2^257319928 is an apocalyptic number.

It is an amenable number.

257319928 is a deficient number, since it is larger than the sum of its proper divisors (225154952).

257319928 is a wasteful number, since it uses less digits than its factorization.

257319928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32164997 (or 32164993 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 257319928 is about 16041.1947185987. The cubic root of 257319928 is about 636.0498293039.

The spelling of 257319928 in words is "two hundred fifty-seven million, three hundred nineteen thousand, nine hundred twenty-eight".