647560672 has 48 divisors (see below), whose sum is σ = 1393552944. Its totient is φ = 293760000.

The previous prime is 647560663. The next prime is 647560721. The reversal of 647560672 is 276065746.

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, 210022 + ... + 213082.

It is an arithmetic number, because the mean of its divisors is an integer number (29032353).

Almost surely, 2^647560672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647560672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696776472).

647560672 is an abundant number, since it is smaller than the sum of its proper divisors (745992272).

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

647560672 is a wasteful number, since it uses less digits than its factorization.

647560672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683 (or 3675 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 647560672 is about 25447.2134427328. The cubic root of 647560672 is about 865.1541360529.

The spelling of 647560672 in words is "six hundred forty-seven million, five hundred sixty thousand, six hundred seventy-two".