685936 has 20 divisors (see below), whose sum is σ = 1361272. Its totient is φ = 334656.

The previous prime is 685907. The next prime is 685939. The reversal of 685936 is 639586.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 685895 and 685904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685939) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 190 + ... + 1186.

2⁶⁸⁵⁹³⁶ is an apocalyptic number.

It is an amenable number.

685936 is a deficient number, since it is larger than the sum of its proper divisors (675336).

685936 is a wasteful number, since it uses less digits than its factorization.

685936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1042 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 685936 is about 828.2125331097. The cubic root of 685936 is about 88.1917307221.

The spelling of 685936 in words is "six hundred eighty-five thousand, nine hundred thirty-six".