9988888867 has 8 divisors (see below), whose sum is σ = 10524477200. Its totient is φ = 9454286304.

The previous prime is 9988888837. The next prime is 9988888909. The reversal of 9988888867 is 7688888899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9988888867 - 2²³ = 9980500259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9988888817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225588 + ... + 266209.

It is an arithmetic number, because the mean of its divisors is an integer number (1315559650).

Almost surely, 2^9988888867 is an apocalyptic number.

9988888867 is a deficient number, since it is larger than the sum of its proper divisors (535588333).

9988888867 is a wasteful number, since it uses less digits than its factorization.

9988888867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492885.

The product of its digits is 891813888, while the sum is 79.

The square root of 9988888867 is about 99944.4288942610. The cubic root of 9988888867 is about 2153.6364539693.

The spelling of 9988888867 in words is "nine billion, nine hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-seven".