685596 has 48 divisors (see below), whose sum is σ = 1756160. Its totient is φ = 207360.

The previous prime is 685591. The next prime is 685609. The reversal of 685596 is 695586.

685596 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 not an unprimeable number, because it can be changed into a prime (685591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7020 + ... + 7116.

2⁶⁸⁵⁵⁹⁶ 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 685596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878080).

685596 is an abundant number, since it is smaller than the sum of its proper divisors (1070564).

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

685596 is a wasteful number, since it uses less digits than its factorization.

685596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 152 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 685596 is about 828.0072463451. The cubic root of 685596 is about 88.1771568920.

The spelling of 685596 in words is "six hundred eighty-five thousand, five hundred ninety-six".