257994369 has 32 divisors (see below), whose sum is σ = 415334400. Its totient is φ = 157677840.

The previous prime is 257994343. The next prime is 257994379. The reversal of 257994369 is 963499752.

257994369 is a `hidden beast` number, since 2 + 579 + 9 + 4 + 3 + 69 = 666.

It is not a de Polignac number, because 257994369 - 2⁷ = 257994241 is a prime.

It is a super-2 number, since 2×257994369² = 133122188871416322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257994379) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 7792 + ... + 24014.

It is an arithmetic number, because the mean of its divisors is an integer number (12979200).

Almost surely, 2^257994369 is an apocalyptic number.

It is an amenable number.

257994369 is a deficient number, since it is larger than the sum of its proper divisors (157340031).

257994369 is a wasteful number, since it uses less digits than its factorization.

257994369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16282 (or 16276 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 257994369 is about 16062.2031178789. The cubic root of 257994369 is about 636.6050445492.

The spelling of 257994369 in words is "two hundred fifty-seven million, nine hundred ninety-four thousand, three hundred sixty-nine".