9919888 has 40 divisors (see below), whose sum is σ = 21159360. Its totient is φ = 4467840.

The previous prime is 9919883. The next prime is 9919933. The reversal of 9919888 is 8889199.

9919888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9919883) 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, 27453 + ... + 27811.

It is an arithmetic number, because the mean of its divisors is an integer number (528984).

Almost surely, 2^9919888 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 9919888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10579680).

9919888 is an abundant number, since it is smaller than the sum of its proper divisors (11239472).

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

9919888 is a wasteful number, since it uses less digits than its factorization.

9919888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 529 counting only the distinct ones).

The product of its digits is 373248, while the sum is 52.

The square root of 9919888 is about 3149.5853695368. The cubic root of 9919888 is about 214.8666055539.

The spelling of 9919888 in words is "nine million, nine hundred nineteen thousand, eight hundred eighty-eight".