9988869 has 16 divisors (see below), whose sum is σ = 14667840. Its totient is φ = 5996160.

The previous prime is 9988817. The next prime is 9988873. The reversal of 9988869 is 9688899.

It is not a de Polignac number, because 9988869 - 2²¹ = 7891717 is a prime.

It is a super-2 number, since 2×9988869² = 199555007798322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988879) 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, 2209 + ... + 4985.

It is an arithmetic number, because the mean of its divisors is an integer number (916740).

Almost surely, 2^9988869 is an apocalyptic number.

It is an amenable number.

9988869 is a deficient number, since it is larger than the sum of its proper divisors (4678971).

9988869 is a wasteful number, since it uses less digits than its factorization.

9988869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900.

The product of its digits is 2239488, while the sum is 57.

The square root of 9988869 is about 3160.5172045094. The cubic root of 9988869 is about 215.3635026172.

The spelling of 9988869 in words is "nine million, nine hundred eighty-eight thousand, eight hundred sixty-nine".