257214788 has 6 divisors (see below), whose sum is σ = 450125886. Its totient is φ = 128607392.

The previous prime is 257214679. The next prime is 257214817. The reversal of 257214788 is 887412752.

It can be written as a sum of positive squares in only one way, i.e., 197739844 + 59474944 = 14062^2 + 7712^2 .

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 as a sum of consecutive naturals, namely, 32151845 + ... + 32151852.

It is an arithmetic number, because the mean of its divisors is an integer number (75020981).

Almost surely, 2^257214788 is an apocalyptic number.

It is an amenable number.

257214788 is a deficient number, since it is larger than the sum of its proper divisors (192911098).

257214788 is a wasteful number, since it uses less digits than its factorization.

257214788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64303701 (or 64303699 counting only the distinct ones).

The product of its digits is 250880, while the sum is 44.

The square root of 257214788 is about 16037.9171964442. The cubic root of 257214788 is about 635.9631882759.

The spelling of 257214788 in words is "two hundred fifty-seven million, two hundred fourteen thousand, seven hundred eighty-eight".