647806976 has 60 divisors (see below), whose sum is σ = 1364417880. Its totient is φ = 306708480.

The previous prime is 647806967. The next prime is 647806979. The reversal of 647806976 is 679608746.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (647806979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310256 + ... + 312336.

It is an arithmetic number, because the mean of its divisors is an integer number (22740298).

Almost surely, 2^647806976 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 647806976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (682208940).

647806976 is an abundant number, since it is smaller than the sum of its proper divisors (716610904).

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

647806976 is an equidigital number, since it uses as much as digits as its factorization.

647806976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128 (or 2102 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 53.

The square root of 647806976 is about 25452.0524909093. The cubic root of 647806976 is about 865.2638111883.

The spelling of 647806976 in words is "six hundred forty-seven million, eight hundred six thousand, nine hundred seventy-six".