11288809 has 8 divisors (see below), whose sum is σ = 12936320. Its totient is φ = 9650016.

The previous prime is 11288807. The next prime is 11288819. The reversal of 11288809 is 90888211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11288809 - 2¹ = 11288807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11288807) 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, 892 + ... + 4834.

It is an arithmetic number, because the mean of its divisors is an integer number (1617040).

Almost surely, 2^11288809 is an apocalyptic number.

It is an amenable number.

11288809 is a deficient number, since it is larger than the sum of its proper divisors (1647511).

11288809 is an equidigital number, since it uses as much as digits as its factorization.

11288809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 11288809 is about 3359.8822896048. The cubic root of 11288809 is about 224.3275991509.

The spelling of 11288809 in words is "eleven million, two hundred eighty-eight thousand, eight hundred nine".