111389028 has 12 divisors (see below), whose sum is σ = 259907760. Its totient is φ = 37129672.

The previous prime is 111389027. The next prime is 111389053. The reversal of 111389028 is 820983111.

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

It is a self number, because there is not a number n which added to its sum of digits gives 111389028.

It is not an unprimeable number, because it can be changed into a prime (111389027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4641198 + ... + 4641221.

It is an arithmetic number, because the mean of its divisors is an integer number (21658980).

Almost surely, 2^111389028 is an apocalyptic number.

It is an amenable number.

111389028 is an abundant number, since it is smaller than the sum of its proper divisors (148518732).

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

111389028 is a wasteful number, since it uses less digits than its factorization.

111389028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9282426 (or 9282424 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 111389028 is about 10554.1000563762. The cubic root of 111389028 is about 481.1503485578.

The spelling of 111389028 in words is "one hundred eleven million, three hundred eighty-nine thousand, twenty-eight".