686888 has 16 divisors (see below), whose sum is σ = 1356000. Its totient is φ = 325296.

The previous prime is 686879. The next prime is 686891. The reversal of 686888 is 888686.

686888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×686888³ = 972252441803337216, which contains 333 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686888.

It is an unprimeable number.

686888 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2108 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (84750).

2⁶⁸⁶⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

686888 is a deficient number, since it is larger than the sum of its proper divisors (669112).

686888 is a wasteful number, since it uses less digits than its factorization.

686888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544 (or 4540 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 686888 is about 828.7870655361. The cubic root of 686888 is about 88.2325118426.

The spelling of 686888 in words is "six hundred eighty-six thousand, eight hundred eighty-eight".