111988224 has 80 divisors (see below), whose sum is σ = 331533840. Its totient is φ = 37324800.

The previous prime is 111988207. The next prime is 111988249. The reversal of 111988224 is 422889111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9774 + ... + 17874.

It is an arithmetic number, because the mean of its divisors is an integer number (4144173).

Almost surely, 2^111988224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111988224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165766920).

111988224 is an abundant number, since it is smaller than the sum of its proper divisors (219545616).

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

111988224 is an frugal number, since it uses more digits than its factorization.

111988224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128 (or 8106 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 111988224 is about 10582.4488659289. The cubic root of 111988224 is about 482.0115582933.

The spelling of 111988224 in words is "one hundred eleven million, nine hundred eighty-eight thousand, two hundred twenty-four".