257900428 has 12 divisors (see below), whose sum is σ = 451439352. Its totient is φ = 128917760.

The previous prime is 257900417. The next prime is 257900437. The reversal of 257900428 is 824009752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23148 + ... + 32428.

It is an arithmetic number, because the mean of its divisors is an integer number (37619946).

Almost surely, 2^257900428 is an apocalyptic number.

It is an amenable number.

257900428 is a deficient number, since it is larger than the sum of its proper divisors (193538924).

257900428 is a wasteful number, since it uses less digits than its factorization.

257900428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16232 (or 16230 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 257900428 is about 16059.2785641199. The cubic root of 257900428 is about 636.5277682186.

The spelling of 257900428 in words is "two hundred fifty-seven million, nine hundred thousand, four hundred twenty-eight".