11640223 has 16 divisors (see below), whose sum is σ = 14575680. Its totient is φ = 9063936.

The previous prime is 11640199. The next prime is 11640241. The reversal of 11640223 is 32204611.

It is not a de Polignac number, because 11640223 - 2⁹ = 11639711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11640223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640253) 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, 1765 + ... + 5137.

It is an arithmetic number, because the mean of its divisors is an integer number (910980).

Almost surely, 2^11640223 is an apocalyptic number.

11640223 is a deficient number, since it is larger than the sum of its proper divisors (2935457).

11640223 is a wasteful number, since it uses less digits than its factorization.

11640223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 11640223 is about 3411.7771029187. Note that the first 3 decimals coincide. The cubic root of 11640223 is about 226.6315836225.

Adding to 11640223 its reverse (32204611), we get a palindrome (43844834).

The spelling of 11640223 in words is "eleven million, six hundred forty thousand, two hundred twenty-three".