685286 has 16 divisors (see below), whose sum is σ = 1213440. Its totient is φ = 284040.

The previous prime is 685271. The next prime is 685297. The reversal of 685286 is 682586.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

685286 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (75840).

2⁶⁸⁵²⁸⁶ is an apocalyptic number.

685286 is a deficient number, since it is larger than the sum of its proper divisors (528154).

685286 is a wasteful number, since it uses less digits than its factorization.

685286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619.

The product of its digits is 23040, while the sum is 35.

The square root of 685286 is about 827.8200287502. The cubic root of 685286 is about 88.1638647882.

The spelling of 685286 in words is "six hundred eighty-five thousand, two hundred eighty-six".