128589632 has 28 divisors (see below), whose sum is σ = 270182340. Its totient is φ = 60512256.

The previous prime is 128589631. The next prime is 128589661. The reversal of 128589632 is 236985821.

It can be written as a sum of positive squares in 2 ways, for example, as 113720896 + 14868736 = 10664^2 + 3856^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128589631) 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 3 ways as a sum of consecutive naturals, for example, 58007 + ... + 60182.

Almost surely, 2^128589632 is an apocalyptic number.

It is an amenable number.

128589632 is an abundant number, since it is smaller than the sum of its proper divisors (141592708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128589632 is a wasteful number, since it uses less digits than its factorization.

128589632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118218 (or 118208 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 128589632 is about 11339.7368576171. The cubic root of 128589632 is about 504.7410782617.

The spelling of 128589632 in words is "one hundred twenty-eight million, five hundred eighty-nine thousand, six hundred thirty-two".