685576 has 24 divisors (see below), whose sum is σ = 1380510. Its totient is φ = 318080.

The previous prime is 685547. The next prime is 685591. The reversal of 685576 is 675586.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 181476 = 710^2 + 426^2 .

Its product of digits (50400) is a multiple of the sum of its prime divisors (90).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9621 + ... + 9691.

2⁶⁸⁵⁵⁷⁶ is an apocalyptic number.

It is an amenable number.

685576 is an abundant number, since it is smaller than the sum of its proper divisors (694934).

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

685576 is a wasteful number, since it uses less digits than its factorization.

685576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 90 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 685576 is about 827.9951690680. The cubic root of 685576 is about 88.1762994578.

The spelling of 685576 in words is "six hundred eighty-five thousand, five hundred seventy-six".