999999888 has 80 divisors (see below), whose sum is σ = 2768620416. Its totient is φ = 310210560.

The previous prime is 999999883. The next prime is 999999893. The reversal of 999999888 is 888999999.

999999888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (999999883) and next prime (999999893).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (999999883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28608 + ... + 53088.

Almost surely, 2^999999888 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 999999888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1384310208).

999999888 is an abundant number, since it is smaller than the sum of its proper divisors (1768620528).

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

999999888 is a wasteful number, since it uses less digits than its factorization.

999999888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24552 (or 24546 counting only the distinct ones).

The product of its digits is 272097792, while the sum is 78.

The square root of 999999888 is about 31622.7748308083. The cubic root of 999999888 is about 999.9999626667. Note that the first 4 decimals are identical.

The spelling of 999999888 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred eighty-eight".