9844021220 has 192 divisors, whose sum is σ = 24559718400. Its totient is φ = 3275965440.

The previous prime is 9844021169. The next prime is 9844021223. The reversal of 9844021220 is 221204489.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9844021223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17484659 + ... + 17485221.

It is an arithmetic number, because the mean of its divisors is an integer number (127915200).

Almost surely, 2^9844021220 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 9844021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12279859200).

9844021220 is an abundant number, since it is smaller than the sum of its proper divisors (14715697180).

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

9844021220 is a wasteful number, since it uses less digits than its factorization.

9844021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 9844021220 is about 99217.0409758324. The cubic root of 9844021220 is about 2143.1744034934.

It can be divided in two parts, 984 and 4021220, that added together give a palindrome (4022204).

The spelling of 9844021220 in words is "nine billion, eight hundred forty-four million, twenty-one thousand, two hundred twenty".