647640304 has 40 divisors (see below), whose sum is σ = 1291370720. Its totient is φ = 314419968.

The previous prime is 647640299. The next prime is 647640319. The reversal of 647640304 is 403046746.

It is a self number, because there is not a number n which added to its sum of digits gives 647640304.

It is a congruent number.

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, 418957 + ... + 420499.

It is an arithmetic number, because the mean of its divisors is an integer number (32284268).

Almost surely, 2^647640304 is an apocalyptic number.

It is an amenable number.

647640304 is a deficient number, since it is larger than the sum of its proper divisors (643730416).

647640304 is a wasteful number, since it uses less digits than its factorization.

647640304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297 (or 2291 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 647640304 is about 25448.7780453208. The cubic root of 647640304 is about 865.1895979194.

The spelling of 647640304 in words is "six hundred forty-seven million, six hundred forty thousand, three hundred four".