680790 has 32 divisors (see below), whose sum is σ = 1783296. Its totient is φ = 164960.

The previous prime is 680783. The next prime is 680803. The reversal of 680790 is 97086.

It is a happy number.

680790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

680790 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 15 ways as a sum of consecutive naturals, for example, 702 + ... + 1361.

It is an arithmetic number, because the mean of its divisors is an integer number (55728).

2⁶⁸⁰⁷⁹⁰ is an apocalyptic number.

680790 is an abundant number, since it is smaller than the sum of its proper divisors (1102506).

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

680790 is a wasteful number, since it uses less digits than its factorization.

680790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 680790 is about 825.0999939401. The cubic root of 680790 is about 87.9706341410.

The spelling of 680790 in words is "six hundred eighty thousand, seven hundred ninety".