257885530 has 24 divisors (see below), whose sum is σ = 539981748. Its totient is φ = 88417728.

The previous prime is 257885527. The next prime is 257885533. The reversal of 257885530 is 35588752.

It is an interprime number because it is at equal distance from previous prime (257885527) and next prime (257885533).

It can be written as a sum of positive squares in 2 ways, for example, as 249608401 + 8277129 = 15799^2 + 2877^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (257885533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262659 + ... + 263638.

Almost surely, 2^257885530 is an apocalyptic number.

257885530 is an abundant number, since it is smaller than the sum of its proper divisors (282096218).

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

257885530 is a wasteful number, since it uses less digits than its factorization.

257885530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526318 (or 526311 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The square root of 257885530 is about 16058.8147134214. The cubic root of 257885530 is about 636.5155113263.

The spelling of 257885530 in words is "two hundred fifty-seven million, eight hundred eighty-five thousand, five hundred thirty".