685626 has 16 divisors (see below), whose sum is σ = 1380000. Its totient is φ = 227088.

The previous prime is 685621. The next prime is 685631. The reversal of 685626 is 626586.

It is an interprime number because it is at equal distance from previous prime (685621) and next prime (685631).

It is not an unprimeable number, because it can be changed into a prime (685621) 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 7 ways as a sum of consecutive naturals, for example, 1125 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (86250).

2⁶⁸⁵⁶²⁶ is an apocalyptic number.

685626 is an abundant number, since it is smaller than the sum of its proper divisors (694374).

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

685626 is a wasteful number, since it uses less digits than its factorization.

685626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its digits is 17280, while the sum is 33.

The square root of 685626 is about 828.0253619304. The cubic root of 685626 is about 88.1784430120.

The spelling of 685626 in words is "six hundred eighty-five thousand, six hundred twenty-six".