685224 has 48 divisors (see below), whose sum is σ = 1921920. Its totient is φ = 220320.

The previous prime is 685199. The next prime is 685231. The reversal of 685224 is 422586.

It is an unprimeable number.

685224 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 11 ways as a sum of consecutive naturals, for example, 2079 + ... + 2385.

It is an arithmetic number, because the mean of its divisors is an integer number (40040).

2⁶⁸⁵²²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960960).

685224 is an abundant number, since it is smaller than the sum of its proper divisors (1236696).

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

685224 is a wasteful number, since it uses less digits than its factorization.

685224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 343 counting only the distinct ones).

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

The square root of 685224 is about 827.7825801501. The cubic root of 685224 is about 88.1612058864.

It can be divided in two parts, 685 and 224, that added together give a palindrome (909).

The spelling of 685224 in words is "six hundred eighty-five thousand, two hundred twenty-four".