9939843072 has 144 divisors (see below), whose sum is σ = 29772844920. Its totient is φ = 3313115136.

The previous prime is 9939843049. The next prime is 9939843097. The reversal of 9939843072 is 2703489399.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 487678 + ... + 507650.

Almost surely, 2^9939843072 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 9939843072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14886422460).

9939843072 is an abundant number, since it is smaller than the sum of its proper divisors (19833001848).

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

9939843072 is an equidigital number, since it uses as much as digits as its factorization.

9939843072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20010 (or 19978 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The square root of 9939843072 is about 99698.7616372440. The cubic root of 9939843072 is about 2150.1058590027.

The spelling of 9939843072 in words is "nine billion, nine hundred thirty-nine million, eight hundred forty-three thousand, seventy-two".