686884 has 24 divisors (see below), whose sum is σ = 1336608. Its totient is φ = 306240.

The previous prime is 686879. The next prime is 686891. The reversal of 686884 is 488686.

It is a happy number.

686884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2832 + ... + 3064.

It is an arithmetic number, because the mean of its divisors is an integer number (55692).

2⁶⁸⁶⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

686884 is a deficient number, since it is larger than the sum of its proper divisors (649724).

686884 is a wasteful number, since it uses less digits than its factorization.

686884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 313 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 686884 is about 828.7846523675. The cubic root of 686884 is about 88.2323405722.

The spelling of 686884 in words is "six hundred eighty-six thousand, eight hundred eighty-four".