11081990 has 16 divisors (see below), whose sum is σ = 20135952. Its totient is φ = 4390944.

The previous prime is 11081969. The next prime is 11082007. The reversal of 11081990 is 9918011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4109 + ... + 6248.

It is an arithmetic number, because the mean of its divisors is an integer number (1258497).

Almost surely, 2^11081990 is an apocalyptic number.

11081990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11081990 is a deficient number, since it is larger than the sum of its proper divisors (9053962).

11081990 is a wasteful number, since it uses less digits than its factorization.

11081990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10471.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 11081990 is about 3328.9623007778. The cubic root of 11081990 is about 222.9491998208.

The spelling of 11081990 in words is "eleven million, eighty-one thousand, nine hundred ninety".