647246970 has 128 divisors (see below), whose sum is σ = 1827360000. Its totient is φ = 162570240.

The previous prime is 647246909. The next prime is 647246983. The reversal of 647246970 is 79642746.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1441306 + ... + 1441754.

It is an arithmetic number, because the mean of its divisors is an integer number (14276250).

Almost surely, 2^647246970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647246970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913680000).

647246970 is an abundant number, since it is smaller than the sum of its proper divisors (1180113030).

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

647246970 is a wasteful number, since it uses less digits than its factorization.

647246970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 647246970 is about 25441.0489170553. The cubic root of 647246970 is about 865.0144094184.

The spelling of 647246970 in words is "six hundred forty-seven million, two hundred forty-six thousand, nine hundred seventy".