128550912 has 192 divisors, whose sum is σ = 406224000. Its totient is φ = 36126720.

The previous prime is 128550907. The next prime is 128551001. The reversal of 128550912 is 219055821.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2107362 + ... + 2107422.

It is an arithmetic number, because the mean of its divisors is an integer number (2115750).

Almost surely, 2^128550912 is an apocalyptic number.

128550912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128550912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203112000).

128550912 is an abundant number, since it is smaller than the sum of its proper divisors (277673088).

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

128550912 is an frugal number, since it uses more digits than its factorization.

128550912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 128550912 is about 11338.0294584200. The cubic root of 128550912 is about 504.6904118220.

The spelling of 128550912 in words is "one hundred twenty-eight million, five hundred fifty thousand, nine hundred twelve".