680704 has 18 divisors (see below), whose sum is σ = 1359260. Its totient is φ = 340224.

The previous prime is 680681. The next prime is 680707. The reversal of 680704 is 407086.

It is a plaindrome in base 9 and base 13.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (680707) by changing a digit.

680704 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 as a sum of consecutive naturals, namely, 1074 + ... + 1585.

2⁶⁸⁰⁷⁰⁴ is an apocalyptic number.

680704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

680704 is a deficient number, since it is larger than the sum of its proper divisors (678556).

680704 is an equidigital number, since it uses as much as digits as its factorization.

680704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675 (or 2661 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 680704 is about 825.0478773986. The cubic root of 680704 is about 87.9669297226.

The spelling of 680704 in words is "six hundred eighty thousand, seven hundred four".