685068 has 12 divisors (see below), whose sum is σ = 1598520. Its totient is φ = 228352.

The previous prime is 685063. The next prime is 685073. The reversal of 685068 is 860586.

It is an interprime number because it is at equal distance from previous prime (685063) and next prime (685073).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (685063) by changing a digit.

685068 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28533 + ... + 28556.

It is an arithmetic number, because the mean of its divisors is an integer number (133210).

2⁶⁸⁵⁰⁶⁸ is an apocalyptic number.

It is an amenable number.

685068 is an abundant number, since it is smaller than the sum of its proper divisors (913452).

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

685068 is a wasteful number, since it uses less digits than its factorization.

685068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57096 (or 57094 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 685068 is about 827.6883471452. The cubic root of 685068 is about 88.1545150369.

Subtracting from 685068 its sum of digits (33), we obtain a triangular number (685035 = T₁₁₇₀).

The spelling of 685068 in words is "six hundred eighty-five thousand, sixty-eight".