686318 has 8 divisors (see below), whose sum is σ = 1083720. Its totient is φ = 325080.

The previous prime is 686317. The next prime is 686321. The reversal of 686318 is 813686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8993 + ... + 9068.

It is an arithmetic number, because the mean of its divisors is an integer number (135465).

2⁶⁸⁶³¹⁸ is an apocalyptic number.

686318 is a deficient number, since it is larger than the sum of its proper divisors (397402).

686318 is a wasteful number, since it uses less digits than its factorization.

686318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18082.

The product of its digits is 6912, while the sum is 32.

The square root of 686318 is about 828.4431181439. The cubic root of 686318 is about 88.2080991049.

The spelling of 686318 in words is "six hundred eighty-six thousand, three hundred eighteen".