680444868 has 24 divisors (see below), whose sum is σ = 1601758368. Its totient is φ = 224807296.

The previous prime is 680444867. The next prime is 680444881. The reversal of 680444868 is 868444086.

It is not an unprimeable number, because it can be changed into a prime (680444861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249546 + ... + 252257.

It is an arithmetic number, because the mean of its divisors is an integer number (66739932).

Almost surely, 2^680444868 is an apocalyptic number.

It is an amenable number.

680444868 is an abundant number, since it is smaller than the sum of its proper divisors (921313500).

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

680444868 is a wasteful number, since it uses less digits than its factorization.

680444868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501923 (or 501921 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 48.

The square root of 680444868 is about 26085.3381806715. The cubic root of 680444868 is about 879.5576581989.

The spelling of 680444868 in words is "six hundred eighty million, four hundred forty-four thousand, eight hundred sixty-eight".