257847130 has 32 divisors (see below), whose sum is σ = 470883600. Its totient is φ = 101647872.

The previous prime is 257847127. The next prime is 257847167. The reversal of 257847130 is 31748752.

It can be written as a sum of positive squares in 8 ways, for example, as 248094001 + 9753129 = 15751^2 + 3123^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 257847130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249094 + ... + 250126.

Almost surely, 2^257847130 is an apocalyptic number.

257847130 is a deficient number, since it is larger than the sum of its proper divisors (213036470).

257847130 is a wasteful number, since it uses less digits than its factorization.

257847130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 257847130 is about 16057.6190638588. The cubic root of 257847130 is about 636.4839166766.

The spelling of 257847130 in words is "two hundred fifty-seven million, eight hundred forty-seven thousand, one hundred thirty".