685044 has 24 divisors (see below), whose sum is σ = 1776320. Its totient is φ = 228312.

The previous prime is 685039. The next prime is 685051. The reversal of 685044 is 440586.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 684999 and 685017.

It is a congruent number.

It is an unprimeable number.

685044 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 in 7 ways as a sum of consecutive naturals, for example, 3064 + ... + 3279.

2⁶⁸⁵⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

685044 is an abundant number, since it is smaller than the sum of its proper divisors (1091276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685044 is a wasteful number, since it uses less digits than its factorization.

685044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6356 (or 6348 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 685044 is about 827.6738488076. The cubic root of 685044 is about 88.1534855853.

The spelling of 685044 in words is "six hundred eighty-five thousand, forty-four".