257385674 has 16 divisors (see below), whose sum is σ = 475173888. Its totient is φ = 101822832.

The previous prime is 257385641. The next prime is 257385683. The reversal of 257385674 is 476583752.

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, 706922 + ... + 707285.

It is an arithmetic number, because the mean of its divisors is an integer number (29698368).

Almost surely, 2^257385674 is an apocalyptic number.

257385674 is a deficient number, since it is larger than the sum of its proper divisors (217788214).

257385674 is a wasteful number, since it uses less digits than its factorization.

257385674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414229.

The product of its digits is 1411200, while the sum is 47.

The square root of 257385674 is about 16043.2438739801. The cubic root of 257385674 is about 636.1039955597.

The spelling of 257385674 in words is "two hundred fifty-seven million, three hundred eighty-five thousand, six hundred seventy-four".