680394 has 48 divisors (see below), whose sum is σ = 1633824. Its totient is φ = 187200.

The previous prime is 680387. The next prime is 680399. The reversal of 680394 is 493086.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (680399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11124 + ... + 11184.

It is an arithmetic number, because the mean of its divisors is an integer number (34038).

2⁶⁸⁰³⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816912).

680394 is an abundant number, since it is smaller than the sum of its proper divisors (953430).

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

680394 is a wasteful number, since it uses less digits than its factorization.

680394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 680394 is about 824.8599881192. The cubic root of 680394 is about 87.9535739963.

The spelling of 680394 in words is "six hundred eighty thousand, three hundred ninety-four".