657489460 has 24 divisors (see below), whose sum is σ = 1390667040. Its totient is φ = 261102624.

The previous prime is 657489449. The next prime is 657489461. The reversal of 657489460 is 64984756.

657489460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×657489460² = 864584780022183200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657489461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115474 + ... + 121033.

It is an arithmetic number, because the mean of its divisors is an integer number (57944460).

Almost surely, 2^657489460 is an apocalyptic number.

It is an amenable number.

657489460 is an abundant number, since it is smaller than the sum of its proper divisors (733177580).

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

657489460 is a wasteful number, since it uses less digits than its factorization.

657489460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236655 (or 236653 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 657489460 is about 25641.5572850012. The cubic root of 657489460 is about 869.5534150507.

The spelling of 657489460 in words is "six hundred fifty-seven million, four hundred eighty-nine thousand, four hundred sixty".