257538708 has 108 divisors (see below), whose sum is σ = 766846080. Its totient is φ = 72654624.

The previous prime is 257538703. The next prime is 257538719. The reversal of 257538708 is 807835752.

257538708 is a `hidden beast` number, since 2 + 575 + 3 + 8 + 70 + 8 = 666.

It is a super-2 number, since 2×257538708² = 132652372236618528, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257538703) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 145533 + ... + 147291.

Almost surely, 2^257538708 is an apocalyptic number.

257538708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257538708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383423040).

257538708 is an abundant number, since it is smaller than the sum of its proper divisors (509307372).

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

257538708 is a wasteful number, since it uses less digits than its factorization.

257538708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The square root of 257538708 is about 16048.0125872333. The cubic root of 257538708 is about 636.2300401976.

The spelling of 257538708 in words is "two hundred fifty-seven million, five hundred thirty-eight thousand, seven hundred eight".