680388 has 36 divisors (see below), whose sum is σ = 1668240. Its totient is φ = 215760.

The previous prime is 680387. The next prime is 680399. The reversal of 680388 is 883086.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680388.

It is not an unprimeable number, because it can be changed into a prime (680387) 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, 11503 + ... + 11561.

It is an arithmetic number, because the mean of its divisors is an integer number (46340).

2⁶⁸⁰³⁸⁸ is an apocalyptic number.

It is an amenable number.

680388 is an abundant number, since it is smaller than the sum of its proper divisors (987852).

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

680388 is a wasteful number, since it uses less digits than its factorization.

680388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 680388 is about 824.8563511303. The cubic root of 680388 is about 87.9533154583.

The spelling of 680388 in words is "six hundred eighty thousand, three hundred eighty-eight".