11220805 has 16 divisors (see below), whose sum is σ = 13964544. Its totient is φ = 8648640.

The previous prime is 11220779. The next prime is 11220809. The reversal of 11220805 is 50802211.

It is a de Polignac number, because none of the positive numbers 2^k-11220805 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24004 + ... + 24466.

It is an arithmetic number, because the mean of its divisors is an integer number (872784).

Almost surely, 2^11220805 is an apocalyptic number.

It is an amenable number.

11220805 is a deficient number, since it is larger than the sum of its proper divisors (2743739).

11220805 is a wasteful number, since it uses less digits than its factorization.

11220805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 11220805 is about 3349.7470053722. The cubic root of 11220805 is about 223.8762403622.

The spelling of 11220805 in words is "eleven million, two hundred twenty thousand, eight hundred five".