68445888 has 112 divisors (see below), whose sum is σ = 209117184. Its totient is φ = 19353600.

The previous prime is 68445857. The next prime is 68445899. The reversal of 68445888 is 88854486.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 68445888.

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, 170488 + ... + 170888.

Almost surely, 2^68445888 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 68445888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104558592).

68445888 is an abundant number, since it is smaller than the sum of its proper divisors (140671296).

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

68445888 is a wasteful number, since it uses less digits than its factorization.

68445888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 540 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 51.

The square root of 68445888 is about 8273.2030073001. The cubic root of 68445888 is about 409.0557050559.

The spelling of 68445888 in words is "sixty-eight million, four hundred forty-five thousand, eight hundred eighty-eight".