257011768 has 32 divisors (see below), whose sum is σ = 533000160. Its totient is φ = 115413120.

The previous prime is 257011751. The next prime is 257011789. The reversal of 257011768 is 867110752.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29548 + ... + 37243.

It is an arithmetic number, because the mean of its divisors is an integer number (16656255).

Almost surely, 2^257011768 is an apocalyptic number.

It is an amenable number.

257011768 is an abundant number, since it is smaller than the sum of its proper divisors (275988392).

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

257011768 is a wasteful number, since it uses less digits than its factorization.

257011768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66847 (or 66843 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 257011768 is about 16031.5865715156. The cubic root of 257011768 is about 635.7958220160.

The spelling of 257011768 in words is "two hundred fifty-seven million, eleven thousand, seven hundred sixty-eight".