68889688 has 48 divisors (see below), whose sum is σ = 155131200. Its totient is φ = 28566720.

The previous prime is 68889683. The next prime is 68889697. The reversal of 68889688 is 88698886.

It is a super-2 number, since 2×68889688² = 9491578225474688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68889683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9318 + ... + 14986.

It is an arithmetic number, because the mean of its divisors is an integer number (3231900).

Almost surely, 2^68889688 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 68889688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77565600).

68889688 is an abundant number, since it is smaller than the sum of its proper divisors (86241512).

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

68889688 is a wasteful number, since it uses less digits than its factorization.

68889688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720 (or 5709 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 61.

The square root of 68889688 is about 8299.9812047980. The cubic root of 68889688 is about 409.9379005690.

The spelling of 68889688 in words is "sixty-eight million, eight hundred eighty-nine thousand, six hundred eighty-eight".