999999998844 has 384 divisors, whose sum is σ = 3007940812800. Its totient is φ = 251102592000.

The previous prime is 999999998821. The next prime is 999999998863. The reversal of 999999998844 is 448899999999.

999999998844 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 853970379 + ... + 853971549.

It is an arithmetic number, because the mean of its divisors is an integer number (7833179200).

Almost surely, 2^999999998844 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 999999998844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1503970406400).

999999998844 is an abundant number, since it is smaller than the sum of its proper divisors (2007940813956).

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

999999998844 is a wasteful number, since it uses less digits than its factorization.

999999998844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505 (or 1503 counting only the distinct ones).

The product of its digits is 44079842304, while the sum is 96.

The spelling of 999999998844 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, eight hundred forty-four".