680390928 has 200 divisors, whose sum is σ = 2312536512. Its totient is φ = 189050112.

The previous prime is 680390903. The next prime is 680390929. The reversal of 680390928 is 829093086.

It is a super-3 number, since 3×680390928³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (680390929) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 334651 + ... + 336677.

Almost surely, 2^680390928 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 680390928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156268256).

680390928 is an abundant number, since it is smaller than the sum of its proper divisors (1632145584).

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

680390928 is a wasteful number, since it uses less digits than its factorization.

680390928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091 (or 2076 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 680390928 is about 26084.3042460404. The cubic root of 680390928 is about 879.5344162503.

The spelling of 680390928 in words is "six hundred eighty million, three hundred ninety thousand, nine hundred twenty-eight".