657538368 has 28 divisors (see below), whose sum is σ = 1739737440. Its totient is φ = 219179392.

The previous prime is 657538363. The next prime is 657538369. The reversal of 657538368 is 863835756.

It is a self number, because there is not a number n which added to its sum of digits gives 657538368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657538363) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1712148 + ... + 1712531.

It is an arithmetic number, because the mean of its divisors is an integer number (62133480).

Almost surely, 2^657538368 is an apocalyptic number.

It is an amenable number.

657538368 is an abundant number, since it is smaller than the sum of its proper divisors (1082199072).

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

657538368 is a wasteful number, since it uses less digits than its factorization.

657538368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424694 (or 3424684 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 51.

The square root of 657538368 is about 25642.5109534928. The cubic root of 657538368 is about 869.5749753780.

The spelling of 657538368 in words is "six hundred fifty-seven million, five hundred thirty-eight thousand, three hundred sixty-eight".