257864674 has 8 divisors (see below), whose sum is σ = 387875520. Its totient is φ = 128572836.

The previous prime is 257864669. The next prime is 257864683. The reversal of 257864674 is 476468752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178854 + ... + 180289.

It is an arithmetic number, because the mean of its divisors is an integer number (48484440).

Almost surely, 2^257864674 is an apocalyptic number.

257864674 is a deficient number, since it is larger than the sum of its proper divisors (130010846).

257864674 is a wasteful number, since it uses less digits than its factorization.

257864674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359504.

The product of its digits is 2257920, while the sum is 49.

The square root of 257864674 is about 16058.1653372980. The cubic root of 257864674 is about 636.4983518714.

The spelling of 257864674 in words is "two hundred fifty-seven million, eight hundred sixty-four thousand, six hundred seventy-four".