11989538 has 8 divisors (see below), whose sum is σ = 19619280. Its totient is φ = 5449780.

The previous prime is 11989531. The next prime is 11989543. The reversal of 11989538 is 83598911.

It is a happy number.

11989538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11989531) 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, 272468 + ... + 272511.

It is an arithmetic number, because the mean of its divisors is an integer number (2452410).

Almost surely, 2^11989538 is an apocalyptic number.

11989538 is a deficient number, since it is larger than the sum of its proper divisors (7629742).

11989538 is a wasteful number, since it uses less digits than its factorization.

11989538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544992.

The product of its digits is 77760, while the sum is 44.

The square root of 11989538 is about 3462.5912262351. The cubic root of 11989538 is about 228.8762958304.

The spelling of 11989538 in words is "eleven million, nine hundred eighty-nine thousand, five hundred thirty-eight".