11989664 has 12 divisors (see below), whose sum is σ = 23604714. Its totient is φ = 5994816.

The previous prime is 11989657. The next prime is 11989669. The reversal of 11989664 is 46698911.

11989664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 3579664 = 2900^2 + 1892^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11989669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187307 + ... + 187370.

Almost surely, 2^11989664 is an apocalyptic number.

It is an amenable number.

11989664 is a deficient number, since it is larger than the sum of its proper divisors (11615050).

11989664 is an equidigital number, since it uses as much as digits as its factorization.

11989664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374687 (or 374679 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 11989664 is about 3462.6094206537. The cubic root of 11989664 is about 228.8770975936.

The spelling of 11989664 in words is "eleven million, nine hundred eighty-nine thousand, six hundred sixty-four".