257866130 has 16 divisors (see below), whose sum is σ = 468756504. Its totient is φ = 102124800.

The previous prime is 257866129. The next prime is 257866151. The reversal of 257866130 is 31668752.

It can be written as a sum of positive squares in 4 ways, for example, as 253733041 + 4133089 = 15929^2 + 2033^2 .

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, 126647 + ... + 128666.

Almost surely, 2^257866130 is an apocalyptic number.

257866130 is a deficient number, since it is larger than the sum of its proper divisors (210890374).

257866130 is a wasteful number, since it uses less digits than its factorization.

257866130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255421.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 257866130 is about 16058.2106724255. The cubic root of 257866130 is about 636.4995498380.

The spelling of 257866130 in words is "two hundred fifty-seven million, eight hundred sixty-six thousand, one hundred thirty".