257998892 has 6 divisors (see below), whose sum is σ = 451498068. Its totient is φ = 128999444.

The previous prime is 257998861. The next prime is 257998901. The reversal of 257998892 is 298899752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32249858 + ... + 32249865.

It is an arithmetic number, because the mean of its divisors is an integer number (75249678).

Almost surely, 2^257998892 is an apocalyptic number.

It is an amenable number.

257998892 is a deficient number, since it is larger than the sum of its proper divisors (193499176).

257998892 is a wasteful number, since it uses less digits than its factorization.

257998892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64499727 (or 64499725 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 59.

The square root of 257998892 is about 16062.3439136385. The cubic root of 257998892 is about 636.6087647180.

The spelling of 257998892 in words is "two hundred fifty-seven million, nine hundred ninety-eight thousand, eight hundred ninety-two".