680444928 has 88 divisors (see below), whose sum is σ = 2015230560. Its totient is φ = 226805760.

The previous prime is 680444923. The next prime is 680444959. The reversal of 680444928 is 829444086.

It is not an unprimeable number, because it can be changed into a prime (680444923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15343 + ... + 39953.

Almost surely, 2^680444928 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 680444928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007615280).

680444928 is an abundant number, since it is smaller than the sum of its proper divisors (1334785632).

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

680444928 is a wasteful number, since it uses less digits than its factorization.

680444928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24640 (or 24616 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 680444928 is about 26085.3393307429. The cubic root of 680444928 is about 879.5576840513.

The spelling of 680444928 in words is "six hundred eighty million, four hundred forty-four thousand, nine hundred twenty-eight".