68636808 has 64 divisors (see below), whose sum is σ = 193060800. Its totient is φ = 22873104.

The previous prime is 68636791. The next prime is 68636819. The reversal of 68636808 is 80863686.

68636808 is a `hidden beast` number, since 6 + 8 + 636 + 8 + 0 + 8 = 666.

It is a super-2 number, since 2×68636808² = 9422022824857728, which contains 22 as substring.

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, 15535 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (3016575).

Almost surely, 2^68636808 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 68636808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96530400).

68636808 is an abundant number, since it is smaller than the sum of its proper divisors (124423992).

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

68636808 is an equidigital number, since it uses as much as digits as its factorization.

68636808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 68636808 is about 8284.7334296283. The cubic root of 68636808 is about 409.4356860717.

The spelling of 68636808 in words is "sixty-eight million, six hundred thirty-six thousand, eight hundred eight".