11001990 has 16 divisors (see below), whose sum is σ = 26404848. Its totient is φ = 2933856.

The previous prime is 11001983. The next prime is 11002001. The reversal of 11001990 is 9910011.

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 183337 + ... + 183396.

It is an arithmetic number, because the mean of its divisors is an integer number (1650303).

Almost surely, 2^11001990 is an apocalyptic number.

11001990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11001990 is an abundant number, since it is smaller than the sum of its proper divisors (15402858).

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

11001990 is a wasteful number, since it uses less digits than its factorization.

11001990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366743.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 11001990 is about 3316.9247805761. The cubic root of 11001990 is about 222.4114195222.

The spelling of 11001990 in words is "eleven million, one thousand, nine hundred ninety".