11019990 has 32 divisors (see below), whose sum is σ = 27599616. Its totient is φ = 2810720.

The previous prime is 11019989. The next prime is 11020001. The reversal of 11019990 is 9991011.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 7296 + ... + 8675.

It is an arithmetic number, because the mean of its divisors is an integer number (862488).

Almost surely, 2^11019990 is an apocalyptic number.

11019990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11019990 is an abundant number, since it is smaller than the sum of its proper divisors (16579626).

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

11019990 is a wasteful number, since it uses less digits than its factorization.

11019990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16004.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 11019990 is about 3319.6370283511. The cubic root of 11019990 is about 222.5326468108.

It can be divided in two parts, 110 and 19990, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 11019990 in words is "eleven million, nineteen thousand, nine hundred ninety".