680900 has 36 divisors (see below), whose sum is σ = 1614480. Its totient is φ = 247200.

The previous prime is 680881. The next prime is 680917. The reversal of 680900 is 9086.

It is a plaindrome in base 13.

It is an unprimeable number.

680900 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 11 ways as a sum of consecutive naturals, for example, 791 + ... + 1409.

2⁶⁸⁰⁹⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807240).

680900 is an abundant number, since it is smaller than the sum of its proper divisors (933580).

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

680900 is a wasteful number, since it uses less digits than its factorization.

680900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 680900 is about 825.1666498350. The cubic root of 680900 is about 87.9753718960.

Adding to 680900 its reverse (9086), we get a palindrome (689986).

The spelling of 680900 in words is "six hundred eighty thousand, nine hundred".