11240809 has 4 divisors (see below), whose sum is σ = 11282560. Its totient is φ = 11199060.

The previous prime is 11240807. The next prime is 11240819. The reversal of 11240809 is 90804211.

It is a happy number.

11240809 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 11240809 - 2¹ = 11240807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11240807) 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, 20469 + ... + 21010.

It is an arithmetic number, because the mean of its divisors is an integer number (2820640).

Almost surely, 2^11240809 is an apocalyptic number.

It is an amenable number.

11240809 is a deficient number, since it is larger than the sum of its proper divisors (41751).

11240809 is an equidigital number, since it uses as much as digits as its factorization.

11240809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41750.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 11240809 is about 3352.7315729119. The cubic root of 11240809 is about 224.0092005681.

The spelling of 11240809 in words is "eleven million, two hundred forty thousand, eight hundred nine".