686204 has 12 divisors (see below), whose sum is σ = 1264200. Its totient is φ = 325008.

The previous prime is 686201. The next prime is 686209. The reversal of 686204 is 402686.

It is a nialpdrome in base 7.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686204.

It is not an unprimeable number, because it can be changed into a prime (686201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4439 + ... + 4590.

It is an arithmetic number, because the mean of its divisors is an integer number (105350).

2⁶⁸⁶²⁰⁴ is an apocalyptic number.

It is an amenable number.

686204 is a deficient number, since it is larger than the sum of its proper divisors (577996).

686204 is a wasteful number, since it uses less digits than its factorization.

686204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9052 (or 9050 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 686204 is about 828.3743115283. The cubic root of 686204 is about 88.2032149355.

The spelling of 686204 in words is "six hundred eighty-six thousand, two hundred four".