9989263920 has 160 divisors (see below), whose sum is σ = 33846405120. Its totient is φ = 2426204160.

The previous prime is 9989263919. The next prime is 9989263931. The reversal of 9989263920 is 293629899.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86991 + ... + 165969.

It is an arithmetic number, because the mean of its divisors is an integer number (211540032).

Almost surely, 2^9989263920 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 9989263920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16923202560).

9989263920 is an abundant number, since it is smaller than the sum of its proper divisors (23857141200).

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

9989263920 is a wasteful number, since it uses less digits than its factorization.

9989263920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79043 (or 79037 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 9989263920 is about 99946.3051843339. The cubic root of 9989263920 is about 2153.6634078415.

The spelling of 9989263920 in words is "nine billion, nine hundred eighty-nine million, two hundred sixty-three thousand, nine hundred twenty".