257638474 has 16 divisors (see below), whose sum is σ = 401694048. Its totient is φ = 123824592.

The previous prime is 257638463. The next prime is 257638529. The reversal of 257638474 is 474836752.

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, 14832 + ... + 27115.

It is an arithmetic number, because the mean of its divisors is an integer number (25105878).

Almost surely, 2^257638474 is an apocalyptic number.

257638474 is a deficient number, since it is larger than the sum of its proper divisors (144055574).

257638474 is a wasteful number, since it uses less digits than its factorization.

257638474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42069.

The product of its digits is 1128960, while the sum is 46.

The square root of 257638474 is about 16051.1206462353. The cubic root of 257638474 is about 636.3121843954.

The spelling of 257638474 in words is "two hundred fifty-seven million, six hundred thirty-eight thousand, four hundred seventy-four".