685630 has 32 divisors (see below), whose sum is σ = 1410048. Its totient is φ = 237600.

The previous prime is 685621. The next prime is 685631. The reversal of 685630 is 36586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685631) 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, 2395 + ... + 2665.

It is an arithmetic number, because the mean of its divisors is an integer number (44064).

2⁶⁸⁵⁶³⁰ is an apocalyptic number.

685630 is an abundant number, since it is smaller than the sum of its proper divisors (724418).

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

685630 is a wasteful number, since it uses less digits than its factorization.

685630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 685630 is about 828.0277773118. The cubic root of 685630 is about 88.1786144918.

It can be divided in two parts, 6856 and 30, that added together give a palindrome (6886).

The spelling of 685630 in words is "six hundred eighty-five thousand, six hundred thirty".