11072809 has 16 divisors (see below), whose sum is σ = 12654720. Its totient is φ = 9596160.

The previous prime is 11072807. The next prime is 11072819. The reversal of 11072809 is 90827011.

11072809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11072809 - 2¹ = 11072807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11072807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32689 + ... + 33025.

It is an arithmetic number, because the mean of its divisors is an integer number (790920).

Almost surely, 2^11072809 is an apocalyptic number.

It is an amenable number.

11072809 is a deficient number, since it is larger than the sum of its proper divisors (1581911).

11072809 is a wasteful number, since it uses less digits than its factorization.

11072809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 11072809 is about 3327.5830568147. The cubic root of 11072809 is about 222.8876145483.

It can be divided in two parts, 11072 and 809, that added together give a square (11881 = 109²).

The spelling of 11072809 in words is "eleven million, seventy-two thousand, eight hundred nine".