111111884028 has 24 divisors (see below), whose sum is σ = 288067847760. Its totient is φ = 37037294640.

The previous prime is 111111884021. The next prime is 111111884053. The reversal of 111111884028 is 820488111111.

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

It is a junction number, because it is equal to n+sod(n) for n = 111111883983 and 111111884001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111884021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514406763 + ... + 514406978.

It is an arithmetic number, because the mean of its divisors is an integer number (12002826990).

Almost surely, 2^111111884028 is an apocalyptic number.

111111884028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

111111884028 is an abundant number, since it is smaller than the sum of its proper divisors (176955963732).

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

111111884028 is a wasteful number, since it uses less digits than its factorization.

111111884028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028813754 (or 1028813746 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 36.

Adding to 111111884028 its reverse (820488111111), we get a palindrome (931599995139).

The spelling of 111111884028 in words is "one hundred eleven billion, one hundred eleven million, eight hundred eighty-four thousand, twenty-eight".