680726 has 8 divisors (see below), whose sum is σ = 1048800. Its totient is φ = 331128.

The previous prime is 680707. The next prime is 680749. The reversal of 680726 is 627086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680726.

It is an unprimeable number.

680726 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4526 + ... + 4673.

It is an arithmetic number, because the mean of its divisors is an integer number (131100).

2⁶⁸⁰⁷²⁶ is an apocalyptic number.

680726 is a deficient number, since it is larger than the sum of its proper divisors (368074).

680726 is a wasteful number, since it uses less digits than its factorization.

680726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9238.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 680726 is about 825.0612098505. The cubic root of 680726 is about 87.9678773942.

The spelling of 680726 in words is "six hundred eighty thousand, seven hundred twenty-six".