257130444 has 12 divisors (see below), whose sum is σ = 599971064. Its totient is φ = 85710144.

The previous prime is 257130421. The next prime is 257130451. The reversal of 257130444 is 444031752.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×257130444² = 132232130463274272, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 10713757 + ... + 10713780.

Almost surely, 2^257130444 is an apocalyptic number.

It is an amenable number.

257130444 is an abundant number, since it is smaller than the sum of its proper divisors (342840620).

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

257130444 is a wasteful number, since it uses less digits than its factorization.

257130444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21427544 (or 21427542 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 257130444 is about 16035.2874623438. The cubic root of 257130444 is about 635.8936672040.

The spelling of 257130444 in words is "two hundred fifty-seven million, one hundred thirty thousand, four hundred forty-four".