9889936 has 40 divisors (see below), whose sum is σ = 22052160. Its totient is φ = 4209024.

The previous prime is 9889933. The next prime is 9889951. The reversal of 9889936 is 6399889.

9889936 = T₃₆₃ + T₃₆₄ + ... + T₄₇₄.

It is not an unprimeable number, because it can be changed into a prime (9889933) 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, 25230 + ... + 25618.

It is an arithmetic number, because the mean of its divisors is an integer number (551304).

Almost surely, 2^9889936 is an apocalyptic number.

9889936 is the 1816-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9889936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11026080).

9889936 is an abundant number, since it is smaller than the sum of its proper divisors (12162224).

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

9889936 is a wasteful number, since it uses less digits than its factorization.

9889936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 625 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The square root of 9889936 is about 3144.8268632788. The cubic root of 9889936 is about 214.6501322519.

The spelling of 9889936 in words is "nine million, eight hundred eighty-nine thousand, nine hundred thirty-six".