990936186 has 16 divisors (see below), whose sum is σ = 2068041024. Its totient is φ = 315950624.

The previous prime is 990936157. The next prime is 990936187. The reversal of 990936186 is 681639099.

It is not an unprimeable number, because it can be changed into a prime (990936187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3590211 + ... + 3590486.

It is an arithmetic number, because the mean of its divisors is an integer number (129252564).

Almost surely, 2^990936186 is an apocalyptic number.

990936186 is an abundant number, since it is smaller than the sum of its proper divisors (1077104838).

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

990936186 is a wasteful number, since it uses less digits than its factorization.

990936186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180725.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 990936186 is about 31479.1389018188. The cubic root of 990936186 is about 996.9695543426.

The spelling of 990936186 in words is "nine hundred ninety million, nine hundred thirty-six thousand, one hundred eighty-six".