111197028 has 12 divisors (see below), whose sum is σ = 259459760. Its totient is φ = 37065672.

The previous prime is 111197027. The next prime is 111197033. The reversal of 111197028 is 820791111.

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 = 111196986 and 111197004.

It is not an unprimeable number, because it can be changed into a prime (111197027) 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, 4633198 + ... + 4633221.

Almost surely, 2^111197028 is an apocalyptic number.

It is an amenable number.

111197028 is an abundant number, since it is smaller than the sum of its proper divisors (148262732).

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

111197028 is a wasteful number, since it uses less digits than its factorization.

111197028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9266426 (or 9266424 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 30.

The square root of 111197028 is about 10545.0001422475. Note that the first 3 decimals coincide. The cubic root of 111197028 is about 480.8737384401.

The spelling of 111197028 in words is "one hundred eleven million, one hundred ninety-seven thousand, twenty-eight".