257394838 has 16 divisors (see below), whose sum is σ = 392421744. Its totient is φ = 126593280.

The previous prime is 257394827. The next prime is 257394857. The reversal of 257394838 is 838493752.

It is a junction number, because it is equal to n+sod(n) for n = 257394791 and 257394800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173058 + ... + 174538.

It is an arithmetic number, because the mean of its divisors is an integer number (24526359).

Almost surely, 2^257394838 is an apocalyptic number.

257394838 is a deficient number, since it is larger than the sum of its proper divisors (135026906).

257394838 is a wasteful number, since it uses less digits than its factorization.

257394838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847.

The product of its digits is 1451520, while the sum is 49.

The square root of 257394838 is about 16043.5294745265. The cubic root of 257394838 is about 636.1115447856. Note that the first 3 decimals are identical.

The spelling of 257394838 in words is "two hundred fifty-seven million, three hundred ninety-four thousand, eight hundred thirty-eight".