647288560 has 20 divisors (see below), whose sum is σ = 1504946088. Its totient is φ = 258915392.

The previous prime is 647288539. The next prime is 647288623. The reversal of 647288560 is 65882746.

647288560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 647288560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4045474 + ... + 4045633.

Almost surely, 2^647288560 is an apocalyptic number.

It is an amenable number.

647288560 is an abundant number, since it is smaller than the sum of its proper divisors (857657528).

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

647288560 is a wasteful number, since it uses less digits than its factorization.

647288560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8091120 (or 8091114 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 647288560 is about 25441.8662837458. The cubic root of 647288560 is about 865.0329366990.

The spelling of 647288560 in words is "six hundred forty-seven million, two hundred eighty-eight thousand, five hundred sixty".