680608 has 12 divisors (see below), whose sum is σ = 1340010. Its totient is φ = 340288.

The previous prime is 680597. The next prime is 680611. The reversal of 680608 is 806086.

It can be written as a sum of positive squares in only one way, i.e., 559504 + 121104 = 748^2 + 348^2 .

It is an unprimeable number.

680608 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10603 + ... + 10666.

2⁶⁸⁰⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

680608 is a deficient number, since it is larger than the sum of its proper divisors (659402).

680608 is a wasteful number, since it uses less digits than its factorization.

680608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21279 (or 21271 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 680608 is about 824.9896969054. The cubic root of 680608 is about 87.9627941892.

The spelling of 680608 in words is "six hundred eighty thousand, six hundred eight".