11563885 has 8 divisors (see below), whose sum is σ = 13900896. Its totient is φ = 9234960.

The previous prime is 11563879. The next prime is 11563889. The reversal of 11563885 is 58836511.

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

It is not a de Polignac number, because 11563885 - 2¹³ = 11555693 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 (11563889) 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 7 ways as a sum of consecutive naturals, for example, 1782 + ... + 5128.

It is an arithmetic number, because the mean of its divisors is an integer number (1737612).

Almost surely, 2^11563885 is an apocalyptic number.

It is an amenable number.

11563885 is a deficient number, since it is larger than the sum of its proper divisors (2337011).

11563885 is an equidigital number, since it uses as much as digits as its factorization.

11563885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043.

The product of its digits is 28800, while the sum is 37.

The square root of 11563885 is about 3400.5712755359. The cubic root of 11563885 is about 226.1350707966.

It can be divided in two parts, 1156 and 3885, that added together give a square (5041 = 71²).

The spelling of 11563885 in words is "eleven million, five hundred sixty-three thousand, eight hundred eighty-five".