11989188 has 48 divisors (see below), whose sum is σ = 32094720. Its totient is φ = 3866400.

The previous prime is 11989177. The next prime is 11989193. The reversal of 11989188 is 88198911.

11989188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1558 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (668640).

Almost surely, 2^11989188 is an apocalyptic number.

11989188 is a gapful number since it is divisible by the number (18) 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 11989188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16047360).

11989188 is an abundant number, since it is smaller than the sum of its proper divisors (20105532).

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

11989188 is a wasteful number, since it uses less digits than its factorization.

11989188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3625 (or 3617 counting only the distinct ones).

The product of its digits is 41472, while the sum is 45.

The square root of 11989188 is about 3462.5406856815. The cubic root of 11989188 is about 228.8740686808.

It can be divided in two parts, 1198918 and 8, that added together give a triangular number (1198926 = T₁₅₄₈).

The spelling of 11989188 in words is "eleven million, nine hundred eighty-nine thousand, one hundred eighty-eight".