109128 has 16 divisors (see below), whose sum is σ = 272880. Its totient is φ = 36368.

The previous prime is 109121. The next prime is 109133. The reversal of 109128 is 821901.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (109121) by changing a digit.

109128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2250 + ... + 2297.

It is an arithmetic number, because the mean of its divisors is an integer number (17055).

2¹⁰⁹¹²⁸ is an apocalyptic number.

It is an amenable number.

109128 is an abundant number, since it is smaller than the sum of its proper divisors (163752).

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

109128 is a wasteful number, since it uses less digits than its factorization.

109128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556 (or 4552 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 109128 is about 330.3452739181. The cubic root of 109128 is about 47.7872528932.

The spelling of 109128 in words is "one hundred nine thousand, one hundred twenty-eight".