257672458 has 4 divisors (see below), whose sum is σ = 386508690. Its totient is φ = 128836228.

The previous prime is 257672423. The next prime is 257672461. The reversal of 257672458 is 854276752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 170380809 + 87291649 = 13053^2 + 9343^2 .

It is a super-2 number, since 2×257672458² = 132790191223523528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64418113 + ... + 64418116.

Almost surely, 2^257672458 is an apocalyptic number.

257672458 is a deficient number, since it is larger than the sum of its proper divisors (128836232).

257672458 is a wasteful number, since it uses less digits than its factorization.

257672458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128836231.

The product of its digits is 940800, while the sum is 46.

The square root of 257672458 is about 16052.1792290019. The cubic root of 257672458 is about 636.3401609138.

The spelling of 257672458 in words is "two hundred fifty-seven million, six hundred seventy-two thousand, four hundred fifty-eight".