680385 has 16 divisors (see below), whose sum is σ = 1106496. Its totient is φ = 356928.

The previous prime is 680377. The next prime is 680387. The reversal of 680385 is 583086.

It is not a de Polignac number, because 680385 - 2³ = 680377 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (680387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (69156).

2⁶⁸⁰³⁸⁵ is an apocalyptic number.

It is an amenable number.

680385 is a deficient number, since it is larger than the sum of its proper divisors (426111).

680385 is a wasteful number, since it uses less digits than its factorization.

680385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 680385 is about 824.8545326298. The cubic root of 680385 is about 87.9531861888.

The spelling of 680385 in words is "six hundred eighty thousand, three hundred eighty-five".