9866688 has 112 divisors (see below), whose sum is σ = 29016960. Its totient is φ = 2939904.

The previous prime is 9866687. The next prime is 9866693. The reversal of 9866688 is 8866689.

Its product of digits (995328) is a multiple of the sum of its prime divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 9866688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866683) 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, 147231 + ... + 147297.

It is an arithmetic number, because the mean of its divisors is an integer number (259080).

Almost surely, 2^9866688 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 9866688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14508480).

9866688 is an abundant number, since it is smaller than the sum of its proper divisors (19150272).

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

9866688 is a wasteful number, since it uses less digits than its factorization.

9866688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 144 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 9866688 is about 3141.1284596463. The cubic root of 9866688 is about 214.4818095756.

Subtracting from 9866688 its reverse (8866689), we obtain a palindrome (999999).

The spelling of 9866688 in words is "nine million, eight hundred sixty-six thousand, six hundred eighty-eight".