647719872 has 56 divisors (see below), whose sum is σ = 1772869200. Its totient is φ = 208459776.

The previous prime is 647719847. The next prime is 647719883. The reversal of 647719872 is 278917746.

647719872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 52597 + ... + 63732.

Almost surely, 2^647719872 is an apocalyptic number.

It is an amenable number.

647719872 is an abundant number, since it is smaller than the sum of its proper divisors (1125149328).

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

647719872 is a wasteful number, since it uses less digits than its factorization.

647719872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116373 (or 116363 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 51.

The square root of 647719872 is about 25450.3412943717. The cubic root of 647719872 is about 865.2250283821.

The spelling of 647719872 in words is "six hundred forty-seven million, seven hundred nineteen thousand, eight hundred seventy-two".