680065938 has 24 divisors (see below), whose sum is σ = 1474390476. Its totient is φ = 226548000.

The previous prime is 680065931. The next prime is 680065951. The reversal of 680065938 is 839560086.

It can be written as a sum of positive squares in 2 ways, for example, as 662702049 + 17363889 = 25743^2 + 4167^2 .

It is a junction number, because it is equal to n+sod(n) for n = 680065893 and 680065902.

It is not an unprimeable number, because it can be changed into a prime (680065931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20488 + ... + 42188.

Almost surely, 2^680065938 is an apocalyptic number.

680065938 is an abundant number, since it is smaller than the sum of its proper divisors (794324538).

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

680065938 is a wasteful number, since it uses less digits than its factorization.

680065938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23450 (or 23447 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 680065938 is about 26078.0738935988. The cubic root of 680065938 is about 879.3943568615.

The spelling of 680065938 in words is "six hundred eighty million, sixty-five thousand, nine hundred thirty-eight".