11188990 has 16 divisors (see below), whose sum is σ = 20330352. Its totient is φ = 4433344.

The previous prime is 11188979. The next prime is 11188997. The reversal of 11188990 is 9988111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11188997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4159 + ... + 6298.

It is an arithmetic number, because the mean of its divisors is an integer number (1270647).

Almost surely, 2^11188990 is an apocalyptic number.

11188990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11188990 is a deficient number, since it is larger than the sum of its proper divisors (9141362).

11188990 is a wasteful number, since it uses less digits than its factorization.

11188990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10571.

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 11188990 is about 3344.9947683068. The cubic root of 11188990 is about 223.6644503008.

The spelling of 11188990 in words is "eleven million, one hundred eighty-eight thousand, nine hundred ninety".