257311378 has 16 divisors (see below), whose sum is σ = 390600000. Its totient is φ = 127120752.

The previous prime is 257311363. The next prime is 257311381. The reversal of 257311378 is 873113752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57133 + ... + 61471.

It is an arithmetic number, because the mean of its divisors is an integer number (24412500).

Almost surely, 2^257311378 is an apocalyptic number.

257311378 is a deficient number, since it is larger than the sum of its proper divisors (133288622).

257311378 is a wasteful number, since it uses less digits than its factorization.

257311378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4689.

The product of its digits is 35280, while the sum is 37.

The square root of 257311378 is about 16040.9282150379. The cubic root of 257311378 is about 636.0427845247.

The spelling of 257311378 in words is "two hundred fifty-seven million, three hundred eleven thousand, three hundred seventy-eight".