11288805 has 32 divisors (see below), whose sum is σ = 20348928. Its totient is φ = 5294400.

The previous prime is 11288773. The next prime is 11288807. The reversal of 11288805 is 50888211.

It is not a de Polignac number, because 11288805 - 2⁵ = 11288773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 4012 + ... + 6218.

It is an arithmetic number, because the mean of its divisors is an integer number (635904).

Almost surely, 2^11288805 is an apocalyptic number.

11288805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11288805 is a deficient number, since it is larger than the sum of its proper divisors (9060123).

11288805 is a wasteful number, since it uses less digits than its factorization.

11288805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 11288805 is about 3359.8816943458. The cubic root of 11288805 is about 224.3275726554.

The spelling of 11288805 in words is "eleven million, two hundred eighty-eight thousand, eight hundred five".