11988644 has 12 divisors (see below), whose sum is σ = 21268044. Its totient is φ = 5912064.

The previous prime is 11988643. The next prime is 11988649. The reversal of 11988644 is 44688911.

It can be written as a sum of positive squares in 2 ways, for example, as 3648100 + 8340544 = 1910^2 + 2888^2 .

It is not an unprimeable number, because it can be changed into a prime (11988643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20237 + ... + 20820.

It is an arithmetic number, because the mean of its divisors is an integer number (1772337).

Almost surely, 2^11988644 is an apocalyptic number.

It is an amenable number.

11988644 is a deficient number, since it is larger than the sum of its proper divisors (9279400).

11988644 is a wasteful number, since it uses less digits than its factorization.

11988644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41134 (or 41132 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 11988644 is about 3462.4621297568. The cubic root of 11988644 is about 228.8706069680.

The spelling of 11988644 in words is "eleven million, nine hundred eighty-eight thousand, six hundred forty-four".