257942456 has 8 divisors (see below), whose sum is σ = 483642120. Its totient is φ = 128971224.

The previous prime is 257942453. The next prime is 257942483. The reversal of 257942456 is 654249752.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257942453) by changing a digit.

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 as a sum of consecutive naturals, namely, 16121396 + ... + 16121411.

It is an arithmetic number, because the mean of its divisors is an integer number (60455265).

Almost surely, 2^257942456 is an apocalyptic number.

It is an amenable number.

257942456 is a deficient number, since it is larger than the sum of its proper divisors (225699664).

257942456 is a wasteful number, since it uses less digits than its factorization.

257942456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32242813 (or 32242809 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The square root of 257942456 is about 16060.5870378389. The cubic root of 257942456 is about 636.5623429783.

The spelling of 257942456 in words is "two hundred fifty-seven million, nine hundred forty-two thousand, four hundred fifty-six".