686896 has 20 divisors (see below), whose sum is σ = 1521232. Its totient is φ = 294336.

The previous prime is 686893. The next prime is 686897. The reversal of 686896 is 698686.

686896 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-2 number, since 2×686896² = 943652229632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686891) 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, 2955 + ... + 3178.

2⁶⁸⁶⁸⁹⁶ is an apocalyptic number.

It is an amenable number.

686896 is an abundant number, since it is smaller than the sum of its proper divisors (834336).

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

686896 is a wasteful number, since it uses less digits than its factorization.

686896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148 (or 6142 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 686896 is about 828.7918918522. The cubic root of 686896 is about 88.2328543813.

It can be divided in two parts, 686 and 896, that multiplied together give a 4-th power (614656 = 28⁴).

The spelling of 686896 in words is "six hundred eighty-six thousand, eight hundred ninety-six".