111811328 has 36 divisors (see below), whose sum is σ = 225289680. Its totient is φ = 55378944.

The previous prime is 111811283. The next prime is 111811331. The reversal of 111811328 is 823118111.

It is a junction number, because it is equal to n+sod(n) for n = 111811297 and 111811306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25901 + ... + 29907.

Almost surely, 2^111811328 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 111811328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112644840).

111811328 is an abundant number, since it is smaller than the sum of its proper divisors (113478352).

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

111811328 is an equidigital number, since it uses as much as digits as its factorization.

111811328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132 (or 4118 counting only the distinct ones).

The product of its digits is 384, while the sum is 26.

The square root of 111811328 is about 10574.0875729303. The cubic root of 111811328 is about 481.7576302516.

Adding to 111811328 its reverse (823118111), we get a palindrome (934929439).

The spelling of 111811328 in words is "one hundred eleven million, eight hundred eleven thousand, three hundred twenty-eight".