257198630 has 64 divisors (see below), whose sum is σ = 541900800. Its totient is φ = 87039360.

The previous prime is 257198629. The next prime is 257198639. The reversal of 257198630 is 36891752.

It is a super-2 number, since 2×257198630² = 132302270547753800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257198639) 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, 74891 + ... + 78249.

It is an arithmetic number, because the mean of its divisors is an integer number (8467200).

Almost surely, 2^257198630 is an apocalyptic number.

257198630 is an abundant number, since it is smaller than the sum of its proper divisors (284702170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257198630 is a wasteful number, since it uses less digits than its factorization.

257198630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 257198630 is about 16037.4134448171. The cubic root of 257198630 is about 635.9498711199.

The spelling of 257198630 in words is "two hundred fifty-seven million, one hundred ninety-eight thousand, six hundred thirty".