990928450 has 24 divisors (see below), whose sum is σ = 1892944692. Its totient is φ = 385657920.

The previous prime is 990928441. The next prime is 990928457. The reversal of 990928450 is 54829099.

It can be written as a sum of positive squares in 6 ways, for example, as 215473041 + 775455409 = 14679^2 + 27847^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 990928450.

It is not an unprimeable number, because it can be changed into a prime (990928457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265969 + ... + 269668.

Almost surely, 2^990928450 is an apocalyptic number.

990928450 is a deficient number, since it is larger than the sum of its proper divisors (902016242).

990928450 is a wasteful number, since it uses less digits than its factorization.

990928450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535686 (or 535681 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 990928450 is about 31479.0160265533. The cubic root of 990928450 is about 996.9669599688.

The spelling of 990928450 in words is "nine hundred ninety million, nine hundred twenty-eight thousand, four hundred fifty".