685342068 has 12 divisors (see below), whose sum is σ = 1599131520. Its totient is φ = 228447352.

The previous prime is 685342067. The next prime is 685342093. The reversal of 685342068 is 860243586.

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

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685342067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28555908 + ... + 28555931.

It is an arithmetic number, because the mean of its divisors is an integer number (133260960).

Almost surely, 2^685342068 is an apocalyptic number.

It is an amenable number.

685342068 is an abundant number, since it is smaller than the sum of its proper divisors (913789452).

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

685342068 is a wasteful number, since it uses less digits than its factorization.

685342068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57111846 (or 57111844 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 685342068 is about 26179.0387142080. The cubic root of 685342068 is about 881.6626915502.

The spelling of 685342068 in words is "six hundred eighty-five million, three hundred forty-two thousand, sixty-eight".