11989944 has 40 divisors (see below), whose sum is σ = 33584760. Its totient is φ = 3996432.

The previous prime is 11989927. The next prime is 11989951. The reversal of 11989944 is 44998911.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 11989944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8604 + ... + 9899.

It is an arithmetic number, because the mean of its divisors is an integer number (839619).

Almost surely, 2^11989944 is an apocalyptic number.

It is an amenable number.

11989944 is an abundant number, since it is smaller than the sum of its proper divisors (21594816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11989944 is a wasteful number, since it uses less digits than its factorization.

11989944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18521 (or 18508 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 11989944 is about 3462.6498523530. The cubic root of 11989944 is about 228.8788792696.

The spelling of 11989944 in words is "eleven million, nine hundred eighty-nine thousand, nine hundred forty-four".