990224128328 has 36 divisors (see below), whose sum is σ = 1903281185835. Its totient is φ = 482979868800.

The previous prime is 990224128319. The next prime is 990224128357. The reversal of 990224128328 is 823821422099.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

990224128328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 269487650884 + 720736477444 = 519122^2 + 848962^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=703642.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 115392998 + ... + 115401578.

Almost surely, 2^990224128328 is an apocalyptic number.

It is an amenable number.

990224128328 is a deficient number, since it is larger than the sum of its proper divisors (913057057507).

990224128328 is an frugal number, since it uses more digits than its factorization.

990224128328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17250 (or 8624 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

Multiplying 990224128328 by its sum of digits (50), we get a square (49511206416400 = 7036420²).

The spelling of 990224128328 in words is "nine hundred ninety billion, two hundred twenty-four million, one hundred twenty-eight thousand, three hundred twenty-eight".