68163888 has 80 divisors (see below), whose sum is σ = 190786400. Its totient is φ = 20846592.

The previous prime is 68163877. The next prime is 68163919. The reversal of 68163888 is 88836186.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195138 + ... + 195486.

It is an arithmetic number, because the mean of its divisors is an integer number (2384830).

Almost surely, 2^68163888 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 68163888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95393200).

68163888 is an abundant number, since it is smaller than the sum of its proper divisors (122622512).

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

68163888 is a wasteful number, since it uses less digits than its factorization.

68163888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 680 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 68163888 is about 8256.1424406317. The cubic root of 68163888 is about 408.4931560772.

The spelling of 68163888 in words is "sixty-eight million, one hundred sixty-three thousand, eight hundred eighty-eight".