11089890 has 96 divisors (see below), whose sum is σ = 34145280. Its totient is φ = 2443392.

The previous prime is 11089877. The next prime is 11089891. The reversal of 11089890 is 9898011.

11089890 = T₈₆₀ + T₈₆₁ + ... + T₈₈₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11089891) 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 47 ways as a sum of consecutive naturals, for example, 17967 + ... + 18573.

It is an arithmetic number, because the mean of its divisors is an integer number (355680).

Almost surely, 2^11089890 is an apocalyptic number.

11089890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11089890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17072640).

11089890 is an abundant number, since it is smaller than the sum of its proper divisors (23055390).

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

11089890 is a wasteful number, since it uses less digits than its factorization.

11089890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 11089890 is about 3330.1486453310. The cubic root of 11089890 is about 223.0021650470.

It can be divided in two parts, 110 and 89890, that added together give a square (90000 = 300²).

The spelling of 11089890 in words is "eleven million, eighty-nine thousand, eight hundred ninety".