68705856 has 84 divisors (see below), whose sum is σ = 199051164. Its totient is φ = 22656000.

The previous prime is 68705851. The next prime is 68705867. The reversal of 68705856 is 65850786.

68705856 is a `hidden beast` number, since 68 + 7 + 0 + 585 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64641600 + 4064256 = 8040^2 + 2016^2 .

It is not an unprimeable number, because it can be changed into a prime (68705851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57586 + ... + 58766.

Almost surely, 2^68705856 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 68705856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99525582).

68705856 is an abundant number, since it is smaller than the sum of its proper divisors (130345308).

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

68705856 is a wasteful number, since it uses less digits than its factorization.

68705856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 68705856 is about 8288.8995650810. The cubic root of 68705856 is about 409.5729362408.

The spelling of 68705856 in words is "sixty-eight million, seven hundred five thousand, eight hundred fifty-six".