990823344 has 160 divisors (see below), whose sum is σ = 3003617280. Its totient is φ = 275616000.

The previous prime is 990823331. The next prime is 990823369. The reversal of 990823344 is 443328099.

It is a happy number.

990823344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 990823296 and 990823305.

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, 2993259 + ... + 2993589.

It is an arithmetic number, because the mean of its divisors is an integer number (18772608).

Almost surely, 2^990823344 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 990823344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1501808640).

990823344 is an abundant number, since it is smaller than the sum of its proper divisors (2012793936).

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

990823344 is a wasteful number, since it uses less digits than its factorization.

990823344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 990823344 is about 31477.3465209506. The cubic root of 990823344 is about 996.9317098912.

The spelling of 990823344 in words is "nine hundred ninety million, eight hundred twenty-three thousand, three hundred forty-four".