990186 has 16 divisors (see below), whose sum is σ = 2006400. Its totient is φ = 325728.

The previous prime is 990181. The next prime is 990211. The reversal of 990186 is 681099.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (990181) 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 7 ways as a sum of consecutive naturals, for example, 571 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (125400).

2⁹⁹⁰¹⁸⁶ is an apocalyptic number.

990186 is an abundant number, since it is smaller than the sum of its proper divisors (1016214).

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

990186 is a wasteful number, since it uses less digits than its factorization.

990186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 990186 is about 995.0809012337. The cubic root of 990186 is about 99.6717906313.

It can be divided in two parts, 990 and 186, that added together give a triangular number (1176 = T₄₈).

The spelling of 990186 in words is "nine hundred ninety thousand, one hundred eighty-six".