128516589 has 24 divisors (see below), whose sum is σ = 196691040. Its totient is φ = 80634528.

The previous prime is 128516581. The next prime is 128516593. The reversal of 128516589 is 985615821.

It is a happy number.

128516589 is a `hidden beast` number, since 12 + 8 + 51 + 6 + 589 = 666.

It is not a de Polignac number, because 128516589 - 2³ = 128516581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128516581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24454 + ... + 29240.

It is an arithmetic number, because the mean of its divisors is an integer number (8195460).

Almost surely, 2^128516589 is an apocalyptic number.

128516589 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

128516589 is a deficient number, since it is larger than the sum of its proper divisors (68174451).

128516589 is a wasteful number, since it uses less digits than its factorization.

128516589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969 (or 4966 counting only the distinct ones).

The product of its digits is 172800, while the sum is 45.

The square root of 128516589 is about 11336.5157345632. The cubic root of 128516589 is about 504.6454904995.

The spelling of 128516589 in words is "one hundred twenty-eight million, five hundred sixteen thousand, five hundred eighty-nine".