11989844 has 6 divisors (see below), whose sum is σ = 20982234. Its totient is φ = 5994920.

The previous prime is 11989837. The next prime is 11989883. The reversal of 11989844 is 44898911.

It can be written as a sum of positive squares in only one way, i.e., 11641744 + 348100 = 3412^2 + 590^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11989795 and 11989804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1498727 + ... + 1498734.

It is an arithmetic number, because the mean of its divisors is an integer number (3497039).

Almost surely, 2^11989844 is an apocalyptic number.

It is an amenable number.

11989844 is a deficient number, since it is larger than the sum of its proper divisors (8992390).

11989844 is a wasteful number, since it uses less digits than its factorization.

11989844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997465 (or 2997463 counting only the distinct ones).

The product of its digits is 82944, while the sum is 44.

The square root of 11989844 is about 3462.6354125146. The cubic root of 11989844 is about 228.8782429599.

The spelling of 11989844 in words is "eleven million, nine hundred eighty-nine thousand, eight hundred forty-four".