128845189 has 8 divisors (see below), whose sum is σ = 143549568. Its totient is φ = 114639360.

The previous prime is 128845169. The next prime is 128845229. The reversal of 128845189 is 981548821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-128845189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128845109) 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 7 ways as a sum of consecutive naturals, for example, 124092 + ... + 125125.

It is an arithmetic number, because the mean of its divisors is an integer number (17943696).

Almost surely, 2^128845189 is an apocalyptic number.

It is an amenable number.

128845189 is a deficient number, since it is larger than the sum of its proper divisors (14704379).

128845189 is a wasteful number, since it uses less digits than its factorization.

128845189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249275.

The product of its digits is 184320, while the sum is 46.

The square root of 128845189 is about 11350.9994714122. Note that the first 3 decimals coincide. The cubic root of 128845189 is about 505.0752284752.

The spelling of 128845189 in words is "one hundred twenty-eight million, eight hundred forty-five thousand, one hundred eighty-nine".