8991888 has 80 divisors (see below), whose sum is σ = 24540096. Its totient is φ = 2833920.

The previous prime is 8991839. The next prime is 8991893. The reversal of 8991888 is 8881998.

Its product of digits (331776) is a multiple of the sum of its prime factors (192).

It is a self number, because there is not a number n which added to its sum of digits gives 8991888.

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, 108295 + ... + 108377.

Almost surely, 2^8991888 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 8991888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12270048).

8991888 is an abundant number, since it is smaller than the sum of its proper divisors (15548208).

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

8991888 is a wasteful number, since it uses less digits than its factorization.

8991888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 186 counting only the distinct ones).

The product of its digits is 331776, while the sum is 51.

The square root of 8991888 is about 2998.6476952120. The cubic root of 8991888 is about 207.9458685567.

The spelling of 8991888 in words is "eight million, nine hundred ninety-one thousand, eight hundred eighty-eight".