257791896 has 56 divisors (see below), whose sum is σ = 724724580. Its totient is φ = 85928688.

The previous prime is 257791879. The next prime is 257791901. The reversal of 257791896 is 698197752.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 in 13 ways as a sum of consecutive naturals, for example, 16270 + ... + 27933.

Almost surely, 2^257791896 is an apocalyptic number.

It is an amenable number.

257791896 is an abundant number, since it is smaller than the sum of its proper divisors (466932684).

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

257791896 is an equidigital number, since it uses as much as digits as its factorization.

257791896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44227 (or 44208 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 257791896 is about 16055.8991028220. The cubic root of 257791896 is about 636.4384658919.

The spelling of 257791896 in words is "two hundred fifty-seven million, seven hundred ninety-one thousand, eight hundred ninety-six".