685300 has 72 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 211200.

The previous prime is 685297. The next prime is 685301. The reversal of 685300 is 3586.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7656 + ... + 7744.

It is an arithmetic number, because the mean of its divisors is an integer number (26040).

2⁶⁸⁵³⁰⁰ 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 685300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937440).

685300 is an abundant number, since it is smaller than the sum of its proper divisors (1189580).

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

685300 is a wasteful number, since it uses less digits than its factorization.

685300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 685300 is about 827.8284846513. The cubic root of 685300 is about 88.1644651632.

Adding to 685300 its reverse (3586), we get a palindrome (688886).

The spelling of 685300 in words is "six hundred eighty-five thousand, three hundred".