680802768 has 30 divisors (see below), whose sum is σ = 1905302594. Its totient is φ = 226934208.

The previous prime is 680802767. The next prime is 680802779. The reversal of 680802768 is 867208086.

It can be written as a sum of positive squares in only one way, i.e., 680583744 + 219024 = 26088^2 + 468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680802763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2363755 + ... + 2364042.

Almost surely, 2^680802768 is an apocalyptic number.

It is an amenable number.

680802768 is an abundant number, since it is smaller than the sum of its proper divisors (1224499826).

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

680802768 is a wasteful number, since it uses less digits than its factorization.

680802768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4727811 (or 4727802 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 680802768 is about 26092.1974544115. The cubic root of 680802768 is about 879.7118409133.

The spelling of 680802768 in words is "six hundred eighty million, eight hundred two thousand, seven hundred sixty-eight".