685230 has 64 divisors (see below), whose sum is σ = 2032128. Its totient is φ = 144000.

The previous prime is 685199. The next prime is 685231. The reversal of 685230 is 32586.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 685230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685231) 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 31 ways as a sum of consecutive naturals, for example, 2605 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (31752).

2⁶⁸⁵²³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016064).

685230 is an abundant number, since it is smaller than the sum of its proper divisors (1346898).

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

685230 is a wasteful number, since it uses less digits than its factorization.

685230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 685230 is about 827.7862042822. The cubic root of 685230 is about 88.1614632065.

The spelling of 685230 in words is "six hundred eighty-five thousand, two hundred thirty".