11989784 has 16 divisors (see below), whose sum is σ = 22817400. Its totient is φ = 5905152.

The previous prime is 11989781. The next prime is 11989793. The reversal of 11989784 is 48798911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989781) 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, 10649 + ... + 11720.

Almost surely, 2^11989784 is an apocalyptic number.

It is an amenable number.

11989784 is a deficient number, since it is larger than the sum of its proper divisors (10827616).

11989784 is a wasteful number, since it uses less digits than its factorization.

11989784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22442 (or 22438 counting only the distinct ones).

The product of its digits is 145152, while the sum is 47.

The square root of 11989784 is about 3462.6267485826. The cubic root of 11989784 is about 228.8778611724.

The spelling of 11989784 in words is "eleven million, nine hundred eighty-nine thousand, seven hundred eighty-four".