128530112 has 42 divisors (see below), whose sum is σ = 259328412. Its totient is φ = 63199744.

The previous prime is 128530109. The next prime is 128530133. The reversal of 128530112 is 211035821.

It is a happy number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 938108 + ... + 938244.

It is an arithmetic number, because the mean of its divisors is an integer number (6174486).

Almost surely, 2^128530112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128530112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129664206).

128530112 is an abundant number, since it is smaller than the sum of its proper divisors (130798300).

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

128530112 is an equidigital number, since it uses as much as digits as its factorization.

128530112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 128530112 is about 11337.1121543363. The cubic root of 128530112 is about 504.6631901124.

Adding to 128530112 its reverse (211035821), we get a palindrome (339565933).

The spelling of 128530112 in words is "one hundred twenty-eight million, five hundred thirty thousand, one hundred twelve".