257717130 has 32 divisors (see below), whose sum is σ = 674751168. Its totient is φ = 62476800.

The previous prime is 257717129. The next prime is 257717137. The reversal of 257717130 is 31717752.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 257717091 and 257717100.

It is not an unprimeable number, because it can be changed into a prime (257717137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390151 + ... + 390810.

It is an arithmetic number, because the mean of its divisors is an integer number (21085974).

Almost surely, 2^257717130 is an apocalyptic number.

257717130 is an abundant number, since it is smaller than the sum of its proper divisors (417034038).

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

257717130 is a wasteful number, since it uses less digits than its factorization.

257717130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780982.

The product of its (nonzero) digits is 10290, while the sum is 33.

The square root of 257717130 is about 16053.5706308597. The cubic root of 257717130 is about 636.3769323320.

The spelling of 257717130 in words is "two hundred fifty-seven million, seven hundred seventeen thousand, one hundred thirty".