9939888 has 160 divisors (see below), whose sum is σ = 34521600. Its totient is φ = 2674944.

The previous prime is 9939857. The next prime is 9939893. The reversal of 9939888 is 8889399.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (1119744) is a multiple of the sum of its prime factors (216).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57370 + ... + 57542.

It is an arithmetic number, because the mean of its divisors is an integer number (215760).

Almost surely, 2^9939888 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 9939888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17260800).

9939888 is an abundant number, since it is smaller than the sum of its proper divisors (24581712).

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

9939888 is a wasteful number, since it uses less digits than its factorization.

9939888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 204 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 9939888 is about 3152.7587919154. The cubic root of 9939888 is about 215.0109098484.

The spelling of 9939888 in words is "nine million, nine hundred thirty-nine thousand, eight hundred eighty-eight".