647039888 has 40 divisors (see below), whose sum is σ = 1370596800. Its totient is φ = 293466240.

The previous prime is 647039881. The next prime is 647039891. The reversal of 647039888 is 888930746.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (647039881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81938 + ... + 89486.

It is an arithmetic number, because the mean of its divisors is an integer number (34264920).

Almost surely, 2^647039888 is an apocalyptic number.

It is an amenable number.

647039888 is an abundant number, since it is smaller than the sum of its proper divisors (723556912).

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

647039888 is a wasteful number, since it uses less digits than its factorization.

647039888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8055 (or 8049 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 647039888 is about 25436.9787514162. The cubic root of 647039888 is about 864.9221478710.

The spelling of 647039888 in words is "six hundred forty-seven million, thirty-nine thousand, eight hundred eighty-eight".