257163968 has 28 divisors (see below), whose sum is σ = 513386832. Its totient is φ = 127806720.

The previous prime is 257163961. The next prime is 257163971. The reversal of 257163968 is 869361752.

It is a super-2 number, since 2×257163968² = 132266612875010048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257163961) 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, 1343 + ... + 22718.

It is an arithmetic number, because the mean of its divisors is an integer number (18335244).

Almost surely, 2^257163968 is an apocalyptic number.

It is an amenable number.

257163968 is a deficient number, since it is larger than the sum of its proper divisors (256222864).

257163968 is a wasteful number, since it uses less digits than its factorization.

257163968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24240 (or 24230 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 257163968 is about 16036.3327478573. The cubic root of 257163968 is about 635.9213013918.

The spelling of 257163968 in words is "two hundred fifty-seven million, one hundred sixty-three thousand, nine hundred sixty-eight".