257989885 has 8 divisors (see below), whose sum is σ = 325882080. Its totient is φ = 195529104.

The previous prime is 257989877. The next prime is 257989903. The reversal of 257989885 is 588989752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257989885 - 2³ = 257989877 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1357747 + ... + 1357936.

It is an arithmetic number, because the mean of its divisors is an integer number (40735260).

Almost surely, 2^257989885 is an apocalyptic number.

It is an amenable number.

257989885 is a deficient number, since it is larger than the sum of its proper divisors (67892195).

257989885 is a wasteful number, since it uses less digits than its factorization.

257989885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715707.

The product of its digits is 14515200, while the sum is 61.

The square root of 257989885 is about 16062.0635349260. The cubic root of 257989885 is about 636.6013564150.

The spelling of 257989885 in words is "two hundred fifty-seven million, nine hundred eighty-nine thousand, eight hundred eighty-five".