111404028 has 12 divisors (see below), whose sum is σ = 259942760. Its totient is φ = 37134672.

The previous prime is 111404021. The next prime is 111404047. The reversal of 111404028 is 820404111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 111403995 and 111404013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111404021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4641823 + ... + 4641846.

Almost surely, 2^111404028 is an apocalyptic number.

It is an amenable number.

111404028 is an abundant number, since it is smaller than the sum of its proper divisors (148538732).

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

111404028 is a wasteful number, since it uses less digits than its factorization.

111404028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9283676 (or 9283674 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 111404028 is about 10554.8106567574. The cubic root of 111404028 is about 481.1719453327.

Adding to 111404028 its reverse (820404111), we get a palindrome (931808139).

The spelling of 111404028 in words is "one hundred eleven million, four hundred four thousand, twenty-eight".