647908604 has 24 divisors (see below), whose sum is σ = 1340502240. Its totient is φ = 268099776.

The previous prime is 647908603. The next prime is 647908669. The reversal of 647908604 is 406809746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647908601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398147 + ... + 399770.

It is an arithmetic number, because the mean of its divisors is an integer number (55854260).

Almost surely, 2^647908604 is an apocalyptic number.

It is an amenable number.

647908604 is an abundant number, since it is smaller than the sum of its proper divisors (692593636).

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

647908604 is a wasteful number, since it uses less digits than its factorization.

647908604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797957 (or 797955 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 647908604 is about 25454.0488724289. The cubic root of 647908604 is about 865.3090563698.

The spelling of 647908604 in words is "six hundred forty-seven million, nine hundred eight thousand, six hundred four".