685674 has 24 divisors (see below), whose sum is σ = 1621152. Its totient is φ = 207720.

The previous prime is 685669. The next prime is 685679. The reversal of 685674 is 476586.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (685669) and next prime (685679).

It is not an unprimeable number, because it can be changed into a prime (685679) 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 11 ways as a sum of consecutive naturals, for example, 1534 + ... + 1929.

It is an arithmetic number, because the mean of its divisors is an integer number (67548).

2⁶⁸⁵⁶⁷⁴ is an apocalyptic number.

685674 is an abundant number, since it is smaller than the sum of its proper divisors (935478).

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

685674 is a wasteful number, since it uses less digits than its factorization.

685674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482 (or 3479 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 685674 is about 828.0543460426. The cubic root of 685674 is about 88.1805007259.

The spelling of 685674 in words is "six hundred eighty-five thousand, six hundred seventy-four".