128089 has 8 divisors (see below), whose sum is σ = 141120. Its totient is φ = 115536.

The previous prime is 128053. The next prime is 128099. The reversal of 128089 is 980821.

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

It is a cyclic number.

It is not a de Polignac number, because 128089 - 2¹¹ = 126041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684 + ... + 850.

It is an arithmetic number, because the mean of its divisors is an integer number (17640).

2¹²⁸⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

128089 is a deficient number, since it is larger than the sum of its proper divisors (13031).

128089 is a wasteful number, since it uses less digits than its factorization.

128089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 128089 is about 357.8952360678. The cubic root of 128089 is about 50.4085198077.

It can be divided in two parts, 1280 and 89, that added together give a square (1369 = 37²).

The spelling of 128089 in words is "one hundred twenty-eight thousand, eighty-nine".