9888888888 has 96 divisors (see below), whose sum is σ = 27812453760. Its totient is φ = 3291775200.

The previous prime is 9888888887. The next prime is 9888888931. The reversal of 9888888888 is 8888888889.

It is a Harshad number since it is a multiple of its sum of digits (81).

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

9888888888 is a modest number, since divided by 888888 gives 9888 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9888888881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1604613 + ... + 1610763.

It is an arithmetic number, because the mean of its divisors is an integer number (289713060).

Almost surely, 2^9888888888 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 9888888888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13906226880).

9888888888 is an abundant number, since it is smaller than the sum of its proper divisors (17923564872).

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

9888888888 is a wasteful number, since it uses less digits than its factorization.

9888888888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999 (or 6983 counting only the distinct ones).

The product of its digits is 1207959552, while the sum is 81.

The square root of 9888888888 is about 99442.8925967060. The cubic root of 9888888888 is about 2146.4255651487.

Subtracting from 9888888888 its reverse (8888888889), we obtain a palindrome (999999999).

The spelling of 9888888888 in words is "nine billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-eight".