686708 has 12 divisors (see below), whose sum is σ = 1311072. Its totient is φ = 312120.

The previous prime is 686687. The next prime is 686723. The reversal of 686708 is 807686.

It is a congruent number.

It is an unprimeable number.

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, 7760 + ... + 7847.

It is an arithmetic number, because the mean of its divisors is an integer number (109256).

2⁶⁸⁶⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

686708 is a deficient number, since it is larger than the sum of its proper divisors (624364).

686708 is a wasteful number, since it uses less digits than its factorization.

686708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15622 (or 15620 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 686708 is about 828.6784659927. The cubic root of 686708 is about 88.2248040165.

It can be divided in two parts, 68 and 6708, that added together give a palindrome (6776).

The spelling of 686708 in words is "six hundred eighty-six thousand, seven hundred eight".