11988816 has 80 divisors (see below), whose sum is σ = 36569088. Its totient is φ = 3312000.

The previous prime is 11988811. The next prime is 11988827. The reversal of 11988816 is 61888911.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11988811) 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, 9841 + ... + 10991.

Almost surely, 2^11988816 is an apocalyptic number.

11988816 is a gapful number since it is divisible by the number (16) 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 11988816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18284544).

11988816 is an abundant number, since it is smaller than the sum of its proper divisors (24580272).

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

11988816 is a wasteful number, since it uses less digits than its factorization.

11988816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1194 counting only the distinct ones).

The product of its digits is 27648, while the sum is 42.

The square root of 11988816 is about 3462.4869674845. The cubic root of 11988816 is about 228.8717014915.

The spelling of 11988816 in words is "eleven million, nine hundred eighty-eight thousand, eight hundred sixteen".