647335672 has 16 divisors (see below), whose sum is σ = 1220112000. Its totient is φ = 321972480.

The previous prime is 647335627. The next prime is 647335679. The reversal of 647335672 is 276533746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647335679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210297 + ... + 213352.

It is an arithmetic number, because the mean of its divisors is an integer number (76257000).

Almost surely, 2^647335672 is an apocalyptic number.

It is an amenable number.

647335672 is a deficient number, since it is larger than the sum of its proper divisors (572776328).

647335672 is a wasteful number, since it uses less digits than its factorization.

647335672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423846 (or 423842 counting only the distinct ones).

The product of its digits is 635040, while the sum is 43.

The square root of 647335672 is about 25442.7921423731. The cubic root of 647335672 is about 865.0539229307.

The spelling of 647335672 in words is "six hundred forty-seven million, three hundred thirty-five thousand, six hundred seventy-two".