685436 has 12 divisors (see below), whose sum is σ = 1205400. Its totient is φ = 341040.

The previous prime is 685429. The next prime is 685453. The reversal of 685436 is 634586.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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 685436.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1151 + ... + 1641.

It is an arithmetic number, because the mean of its divisors is an integer number (100450).

2⁶⁸⁵⁴³⁶ is an apocalyptic number.

It is an amenable number.

685436 is a deficient number, since it is larger than the sum of its proper divisors (519964).

685436 is a wasteful number, since it uses less digits than its factorization.

685436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 842 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 685436 is about 827.9106231955. The cubic root of 685436 is about 88.1702969518.

The spelling of 685436 in words is "six hundred eighty-five thousand, four hundred thirty-six".