686886 has 16 divisors (see below), whose sum is σ = 1382400. Its totient is φ = 227528.

The previous prime is 686879. The next prime is 686891. The reversal of 686886 is 688686.

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 686886.

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 7 ways as a sum of consecutive naturals, for example, 1195 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (86400).

2⁶⁸⁶⁸⁸⁶ is an apocalyptic number.

686886 is an abundant number, since it is smaller than the sum of its proper divisors (695514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686886 is a wasteful number, since it uses less digits than its factorization.

686886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723.

The product of its digits is 110592, while the sum is 42.

The square root of 686886 is about 828.7858589527. The cubic root of 686886 is about 88.2324262074.

The spelling of 686886 in words is "six hundred eighty-six thousand, eight hundred eighty-six".