990036 has 48 divisors (see below), whose sum is σ = 2620800. Its totient is φ = 323136.

The previous prime is 990023. The next prime is 990037. The reversal of 990036 is 630099.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 989991 and 990009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990037) by changing a digit.

990036 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 9561 + ... + 9663.

It is an arithmetic number, because the mean of its divisors is an integer number (54600).

2⁹⁹⁰⁰³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1310400).

990036 is an abundant number, since it is smaller than the sum of its proper divisors (1630764).

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

990036 is a wasteful number, since it uses less digits than its factorization.

990036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 990036 is about 995.0055276228. The cubic root of 990036 is about 99.6667573939. Note that the first 3 decimals are identical.

The spelling of 990036 in words is "nine hundred ninety thousand, thirty-six".