257745892 has 12 divisors (see below), whose sum is σ = 451590076. Its totient is φ = 128720160.

The previous prime is 257745877. The next prime is 257745911. The reversal of 257745892 is 298547752.

It can be written as a sum of positive squares in 2 ways, for example, as 62473216 + 195272676 = 7904^2 + 13974^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34359 + ... + 41182.

Almost surely, 2^257745892 is an apocalyptic number.

It is an amenable number.

257745892 is a deficient number, since it is larger than the sum of its proper divisors (193844184).

257745892 is a wasteful number, since it uses less digits than its factorization.

257745892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76398 (or 76396 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 49.

The square root of 257745892 is about 16054.4664190374. The cubic root of 257745892 is about 636.4006053056.

The spelling of 257745892 in words is "two hundred fifty-seven million, seven hundred forty-five thousand, eight hundred ninety-two".