844299800820 has 432 divisors, whose sum is σ = 3001347917568. Its totient is φ = 191552739840.

The previous prime is 844299800783. The next prime is 844299800887. The reversal of 844299800820 is 28008992448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 891551587 + ... + 891552533.

It is an arithmetic number, because the mean of its divisors is an integer number (6947564624).

Almost surely, 2^844299800820 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 844299800820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500673958784).

844299800820 is an abundant number, since it is smaller than the sum of its proper divisors (2157048116748).

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

844299800820 is a wasteful number, since it uses less digits than its factorization.

844299800820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 844299800820 in words is "eight hundred forty-four billion, two hundred ninety-nine million, eight hundred thousand, eight hundred twenty".