11861636 has 12 divisors (see below), whose sum is σ = 21240912. Its totient is φ = 5792808.

The previous prime is 11861627. The next prime is 11861639. The reversal of 11861636 is 63616811.

It is not an unprimeable number, because it can be changed into a prime (11861639) 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 3 ways as a sum of consecutive naturals, for example, 34310 + ... + 34653.

It is an arithmetic number, because the mean of its divisors is an integer number (1770076).

Almost surely, 2^11861636 is an apocalyptic number.

It is an amenable number.

11861636 is a deficient number, since it is larger than the sum of its proper divisors (9379276).

11861636 is a wasteful number, since it uses less digits than its factorization.

11861636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69010 (or 69008 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 11861636 is about 3444.0725892466. The cubic root of 11861636 is about 228.0595156009.

The spelling of 11861636 in words is "eleven million, eight hundred sixty-one thousand, six hundred thirty-six".