657649480 has 32 divisors (see below), whose sum is σ = 1496345400. Its totient is φ = 260102656.

The previous prime is 657649477. The next prime is 657649519. The reversal of 657649480 is 84946756.

It can be written as a sum of positive squares in 4 ways, for example, as 376282404 + 281367076 = 19398^2 + 16774^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88807 + ... + 95926.

Almost surely, 2^657649480 is an apocalyptic number.

It is an amenable number.

657649480 is an abundant number, since it is smaller than the sum of its proper divisors (838695920).

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

657649480 is a wasteful number, since it uses less digits than its factorization.

657649480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184833 (or 184829 counting only the distinct ones).

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

The square root of 657649480 is about 25644.6774204707. The cubic root of 657649480 is about 869.6239533934.

The spelling of 657649480 in words is "six hundred fifty-seven million, six hundred forty-nine thousand, four hundred eighty".