9639888 has 40 divisors (see below), whose sum is σ = 25438848. Its totient is φ = 3144192.

The previous prime is 9639887. The next prime is 9639899. The reversal of 9639888 is 8889369.

It is a self number, because there is not a number n which added to its sum of digits gives 9639888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9639881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120 + ... + 4392.

Almost surely, 2^9639888 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 9639888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12719424).

9639888 is an abundant number, since it is smaller than the sum of its proper divisors (15798960).

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

9639888 is a wasteful number, since it uses less digits than its factorization.

9639888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4331 (or 4325 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The square root of 9639888 is about 3104.8169028141. The cubic root of 9639888 is about 212.8256635150.

The spelling of 9639888 in words is "nine million, six hundred thirty-nine thousand, eight hundred eighty-eight".