685444 has 24 divisors (see below), whose sum is σ = 1310400. Its totient is φ = 312480.

The previous prime is 685429. The next prime is 685453. The reversal of 685444 is 444586.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2049 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (54600).

2⁶⁸⁵⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

685444 is a deficient number, since it is larger than the sum of its proper divisors (624956).

685444 is a wasteful number, since it uses less digits than its factorization.

685444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 361 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 685444 is about 827.9154546208. The cubic root of 685444 is about 88.1706399741.

The spelling of 685444 in words is "six hundred eighty-five thousand, four hundred forty-four".