11188890 has 96 divisors (see below), whose sum is σ = 31539456. Its totient is φ = 2741760.

The previous prime is 11188889. The next prime is 11188897. The reversal of 11188890 is 9888111.

It is not an unprimeable number, because it can be changed into a prime (11188897) 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, 108579 + ... + 108681.

It is an arithmetic number, because the mean of its divisors is an integer number (328536).

Almost surely, 2^11188890 is an apocalyptic number.

11188890 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 11188890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15769728).

11188890 is an abundant number, since it is smaller than the sum of its proper divisors (20350566).

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

11188890 is a wasteful number, since it uses less digits than its factorization.

11188890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 11188890 is about 3344.9798205669. The cubic root of 11188890 is about 223.6637839758.

The spelling of 11188890 in words is "eleven million, one hundred eighty-eight thousand, eight hundred ninety".