128845089 has 12 divisors (see below), whose sum is σ = 186770896. Its totient is φ = 85591512.

The previous prime is 128845081. The next prime is 128845097. The reversal of 128845089 is 980548821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128845081) and next prime (128845097).

It is not a de Polignac number, because 128845089 - 2³ = 128845081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128845081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22747 + ... + 27840.

Almost surely, 2^128845089 is an apocalyptic number.

It is an amenable number.

128845089 is a deficient number, since it is larger than the sum of its proper divisors (57925807).

128845089 is a wasteful number, since it uses less digits than its factorization.

128845089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50876 (or 50873 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 128845089 is about 11350.9950665129. The cubic root of 128845089 is about 505.0750978080.

The spelling of 128845089 in words is "one hundred twenty-eight million, eight hundred forty-five thousand, eighty-nine".