990486 has 36 divisors (see below), whose sum is σ = 2498652. Its totient is φ = 282744.

The previous prime is 990469. The next prime is 990487. The reversal of 990486 is 684099.

It is a self number, because there is not a number n which added to its sum of digits gives 990486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990487) 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 17 ways as a sum of consecutive naturals, for example, 321 + ... + 1443.

It is an arithmetic number, because the mean of its divisors is an integer number (69407).

2⁹⁹⁰⁴⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249326).

990486 is an abundant number, since it is smaller than the sum of its proper divisors (1508166).

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

990486 is a wasteful number, since it uses less digits than its factorization.

990486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 990486 is about 995.2316313301. The cubic root of 990486 is about 99.6818555813.

The spelling of 990486 in words is "nine hundred ninety thousand, four hundred eighty-six".