257713770 has 32 divisors (see below), whose sum is σ = 629000640. Its totient is φ = 67558400.

The previous prime is 257713751. The next prime is 257713783. The reversal of 257713770 is 77317752.

It is a super-2 number, since 2×257713770² = 132832774495225800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71031 + ... + 74570.

It is an arithmetic number, because the mean of its divisors is an integer number (19656270).

Almost surely, 2^257713770 is an apocalyptic number.

257713770 is an abundant number, since it is smaller than the sum of its proper divisors (371286870).

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

257713770 is a wasteful number, since it uses less digits than its factorization.

257713770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145670.

The product of its (nonzero) digits is 72030, while the sum is 39.

The square root of 257713770 is about 16053.4659809027. The cubic root of 257713770 is about 636.3741667212.

The spelling of 257713770 in words is "two hundred fifty-seven million, seven hundred thirteen thousand, seven hundred seventy".