990455328 has 72 divisors (see below), whose sum is σ = 2913756300. Its totient is φ = 318764544.

The previous prime is 990455321. The next prime is 990455339. The reversal of 990455328 is 823554099.

990455328 is a `hidden beast` number, since 9 + 90 + 4 + 553 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 858021264 + 132434064 = 29292^2 + 11508^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (990455321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50943 + ... + 67646.

Almost surely, 2^990455328 is an apocalyptic number.

It is an amenable number.

990455328 is an abundant number, since it is smaller than the sum of its proper divisors (1923300972).

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

990455328 is a wasteful number, since it uses less digits than its factorization.

990455328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118634 (or 118623 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 990455328 is about 31471.5002502264. The cubic root of 990455328 is about 996.8082663412.

The spelling of 990455328 in words is "nine hundred ninety million, four hundred fifty-five thousand, three hundred twenty-eight".