685356 has 48 divisors (see below), whose sum is σ = 1881600. Its totient is φ = 190080.

The previous prime is 685339. The next prime is 685361. The reversal of 685356 is 653586.

685356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

685356 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 15 ways as a sum of consecutive naturals, for example, 3345 + ... + 3543.

It is an arithmetic number, because the mean of its divisors is an integer number (39200).

2⁶⁸⁵³⁵⁶ 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 685356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940800).

685356 is an abundant number, since it is smaller than the sum of its proper divisors (1196244).

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

685356 is a wasteful number, since it uses less digits than its factorization.

685356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 252 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 685356 is about 827.8623073918. The cubic root of 685356 is about 88.1668665813.

The spelling of 685356 in words is "six hundred eighty-five thousand, three hundred fifty-six".