990324644 has 12 divisors (see below), whose sum is σ = 1733432064. Its totient is φ = 495058344.

The previous prime is 990324641. The next prime is 990324653. The reversal of 990324644 is 446423099.

990324644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (990324641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2132 + ... + 44555.

It is an arithmetic number, because the mean of its divisors is an integer number (144452672).

Almost surely, 2^990324644 is an apocalyptic number.

It is an amenable number.

990324644 is a deficient number, since it is larger than the sum of its proper divisors (743107420).

990324644 is a wasteful number, since it uses less digits than its factorization.

990324644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51994 (or 51992 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 990324644 is about 31469.4239540542. The cubic root of 990324644 is about 996.7644236702.

The spelling of 990324644 in words is "nine hundred ninety million, three hundred twenty-four thousand, six hundred forty-four".