189128 has 16 divisors (see below), whose sum is σ = 362880.
Its totient is φ = 92368.
The previous prime is 189127. The next prime is 189139. The reversal of 189128 is 821981.
189128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a self number, because there is not a number n which added to its sum of digits gives 189128.
It is not an unprimeable number, because it can be changed into a prime (189127) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125 + ... + 627.
It is an arithmetic number, because the mean of its divisors is an integer number (22680).
2189128 is an apocalyptic number.
It is an amenable number.
189128 is a deficient number, since it is larger than the sum of its proper divisors (173752).
189128 is a wasteful number, since it uses less digits than its factorization.
189128 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 556 (or 552 counting only the distinct ones).
The product of its digits is 1152, while the sum is 29.
The square root of 189128 is about 434.8884914550.
Note that the first 3 decimals coincide.
The cubic root of 189128 is about 57.4008878608.
The spelling of 189128 in words is "one hundred eighty-nine thousand, one hundred twenty-eight".