685008 has 60 divisors (see below), whose sum is σ = 1973088. Its totient is φ = 221760.

The previous prime is 685001. The next prime is 685019. The reversal of 685008 is 800586.

685008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9613 + ... + 9683.

2⁶⁸⁵⁰⁰⁸ 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 685008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (986544).

685008 is an abundant number, since it is smaller than the sum of its proper divisors (1288080).

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

685008 is a wasteful number, since it uses less digits than its factorization.

685008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 685008 is about 827.6521008250. The cubic root of 685008 is about 88.1519413628.

Adding to 685008 its sum of digits (27), we get a triangular number (685035 = T₁₁₇₀).

The spelling of 685008 in words is "six hundred eighty-five thousand, eight".