990585 has 12 divisors (see below), whose sum is σ = 1717092. Its totient is φ = 528288.

The previous prime is 990559. The next prime is 990589. The reversal of 990585 is 585099.

It can be written as a sum of positive squares in 2 ways, for example, as 522729 + 467856 = 723^2 + 684^2 .

It is not a de Polignac number, because 990585 - 2⁸ = 990329 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990585.

It is not an unprimeable number, because it can be changed into a prime (990589) 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, 10962 + ... + 11051.

It is an arithmetic number, because the mean of its divisors is an integer number (143091).

2⁹⁹⁰⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

990585 is a deficient number, since it is larger than the sum of its proper divisors (726507).

990585 is a wasteful number, since it uses less digits than its factorization.

990585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22024 (or 22021 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 990585 is about 995.2813672525. The cubic root of 990585 is about 99.6851765689.

The spelling of 990585 in words is "nine hundred ninety thousand, five hundred eighty-five".