11989120 has 128 divisors (see below), whose sum is σ = 33929280. Its totient is φ = 3993600.

The previous prime is 11989099. The next prime is 11989121. The reversal of 11989120 is 2198911.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (11989121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91455 + ... + 91585.

Almost surely, 2^11989120 is an apocalyptic number.

11989120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11989120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16964640).

11989120 is an abundant number, since it is smaller than the sum of its proper divisors (21940160).

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

11989120 is a wasteful number, since it uses less digits than its factorization.

11989120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 11989120 is about 3462.5308662884. The cubic root of 11989120 is about 228.8736359724.

It can be divided in two parts, 119891 and 20, that added together give a palindrome (119911).

The spelling of 11989120 in words is "eleven million, nine hundred eighty-nine thousand, one hundred twenty".