11228809 has 4 divisors (see below), whose sum is σ = 11241216. Its totient is φ = 11216404.

The previous prime is 11228779. The next prime is 11228831. The reversal of 11228809 is 90882211.

It is a happy number.

11228809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11228809 - 2⁷ = 11228681 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11228839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4729 + ... + 6694.

It is an arithmetic number, because the mean of its divisors is an integer number (2810304).

Almost surely, 2^11228809 is an apocalyptic number.

It is an amenable number.

11228809 is a deficient number, since it is larger than the sum of its proper divisors (12407).

11228809 is an equidigital number, since it uses as much as digits as its factorization.

11228809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12406.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 11228809 is about 3350.9415094866. The cubic root of 11228809 is about 223.9294593464.

The spelling of 11228809 in words is "eleven million, two hundred twenty-eight thousand, eight hundred nine".