257890988 has 24 divisors (see below), whose sum is σ = 458858400. Its totient is φ = 126806400.

The previous prime is 257890987. The next prime is 257890993. The reversal of 257890988 is 889098752.

It is a super-2 number, since 2×257890988² = 133015523383232288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257890987) by changing a digit.

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, 59288 + ... + 63488.

It is an arithmetic number, because the mean of its divisors is an integer number (19119100).

Almost surely, 2^257890988 is an apocalyptic number.

It is an amenable number.

257890988 is a deficient number, since it is larger than the sum of its proper divisors (200967412).

257890988 is a wasteful number, since it uses less digits than its factorization.

257890988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457 (or 4455 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 56.

The square root of 257890988 is about 16058.9846503445. The cubic root of 257890988 is about 636.5200017904.

The spelling of 257890988 in words is "two hundred fifty-seven million, eight hundred ninety thousand, nine hundred eighty-eight".