257185268 has 12 divisors (see below), whose sum is σ = 450371712. Its totient is φ = 128507640.

The previous prime is 257185267. The next prime is 257185283. The reversal of 257185268 is 862581752.

It is a super-2 number, since 2×257185268² = 132288524152463648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257185267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14180 + ... + 26747.

It is an arithmetic number, because the mean of its divisors is an integer number (37530976).

Almost surely, 2^257185268 is an apocalyptic number.

It is an amenable number.

257185268 is a deficient number, since it is larger than the sum of its proper divisors (193186444).

257185268 is a wasteful number, since it uses less digits than its factorization.

257185268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42502 (or 42500 counting only the distinct ones).

The product of its digits is 268800, while the sum is 44.

The square root of 257185268 is about 16036.9968510317. The cubic root of 257185268 is about 635.9388579594.

The spelling of 257185268 in words is "two hundred fifty-seven million, one hundred eighty-five thousand, two hundred sixty-eight".