686022 has 16 divisors (see below), whose sum is σ = 1404480. Its totient is φ = 223272.

The previous prime is 686011. The next prime is 686027. The reversal of 686022 is 220686.

It is a junction number, because it is equal to n+sod(n) for n = 685983 and 686001.

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 686022.

It is not an unprimeable number, because it can be changed into a prime (686027) by changing a digit.

686022 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 7 ways as a sum of consecutive naturals, for example, 1072 + ... + 1587.

It is an arithmetic number, because the mean of its divisors is an integer number (87780).

2⁶⁸⁶⁰²² is an apocalyptic number.

686022 is an abundant number, since it is smaller than the sum of its proper divisors (718458).

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

686022 is a wasteful number, since it uses less digits than its factorization.

686022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 686022 is about 828.2644505229. The cubic root of 686022 is about 88.1954162806.

The spelling of 686022 in words is "six hundred eighty-six thousand, twenty-two".