128555336 has 128 divisors (see below), whose sum is σ = 313286400. Its totient is φ = 48107520.

The previous prime is 128555327. The next prime is 128555341. The reversal of 128555336 is 633555821.

It is a self number, because there is not a number n which added to its sum of digits gives 128555336.

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 31 ways as a sum of consecutive naturals, for example, 1760996 + ... + 1761068.

It is an arithmetic number, because the mean of its divisors is an integer number (2447550).

Almost surely, 2^128555336 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 128555336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156643200).

128555336 is an abundant number, since it is smaller than the sum of its proper divisors (184731064).

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

128555336 is a wasteful number, since it uses less digits than its factorization.

128555336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 195 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 128555336 is about 11338.2245523715. The cubic root of 128555336 is about 504.6962012916.

The spelling of 128555336 in words is "one hundred twenty-eight million, five hundred fifty-five thousand, three hundred thirty-six".