111428911 has 24 divisors (see below), whose sum is σ = 128120832. Its totient is φ = 96087600.

The previous prime is 111428903. The next prime is 111428923. The reversal of 111428911 is 119824111.

It is not a de Polignac number, because 111428911 - 2³ = 111428903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111428911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111428111) 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 23 ways as a sum of consecutive naturals, for example, 877330 + ... + 877456.

It is an arithmetic number, because the mean of its divisors is an integer number (5338368).

Almost surely, 2^111428911 is an apocalyptic number.

111428911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111428911 is a deficient number, since it is larger than the sum of its proper divisors (16691921).

111428911 is a wasteful number, since it uses less digits than its factorization.

111428911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 252 counting only the distinct ones).

The product of its digits is 576, while the sum is 28.

The square root of 111428911 is about 10555.9893425486. The cubic root of 111428911 is about 481.2077672277.

The spelling of 111428911 in words is "one hundred eleven million, four hundred twenty-eight thousand, nine hundred eleven".