685227168 has 96 divisors (see below), whose sum is σ = 2004952320. Its totient is φ = 227681280.

The previous prime is 685227139. The next prime is 685227181. The reversal of 685227168 is 861722586.

685227168 is a `hidden beast` number, since 68 + 522 + 7 + 1 + 68 = 666.

685227168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316008 + ... + 318168.

It is an arithmetic number, because the mean of its divisors is an integer number (20884920).

Almost surely, 2^685227168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685227168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002476160).

685227168 is an abundant number, since it is smaller than the sum of its proper divisors (1319725152).

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

685227168 is a wasteful number, since it uses less digits than its factorization.

685227168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547 (or 2533 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 685227168 is about 26176.8441184189. The cubic root of 685227168 is about 881.6134175162.

The spelling of 685227168 in words is "six hundred eighty-five million, two hundred twenty-seven thousand, one hundred sixty-eight".