647266752 has 252 divisors, whose sum is σ = 2102726808. Its totient is φ = 190080000.

The previous prime is 647266733. The next prime is 647266769. The reversal of 647266752 is 257662746.

It is a junction number, because it is equal to n+sod(n) for n = 647266698 and 647266707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2578627 + ... + 2578877.

It is an arithmetic number, because the mean of its divisors is an integer number (8344154).

Almost surely, 2^647266752 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 647266752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051363404).

647266752 is an abundant number, since it is smaller than the sum of its proper divisors (1455460056).

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

647266752 is a wasteful number, since it uses less digits than its factorization.

647266752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 304 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 647266752 is about 25441.4376952247. The cubic root of 647266752 is about 865.0232218921.

The spelling of 647266752 in words is "six hundred forty-seven million, two hundred sixty-six thousand, seven hundred fifty-two".