686284 has 6 divisors (see below), whose sum is σ = 1201004. Its totient is φ = 343140.

The previous prime is 686269. The next prime is 686293. The reversal of 686284 is 482686.

686284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 7.

It is an unprimeable number.

686284 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 as a sum of consecutive naturals, namely, 85782 + ... + 85789.

2⁶⁸⁶²⁸⁴ is an apocalyptic number.

It is an amenable number.

686284 is a deficient number, since it is larger than the sum of its proper divisors (514720).

686284 is a wasteful number, since it uses less digits than its factorization.

686284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171575 (or 171573 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 686284 is about 828.4225974706. The cubic root of 686284 is about 88.2066424794.

The spelling of 686284 in words is "six hundred eighty-six thousand, two hundred eighty-four".