128055839 has 8 divisors (see below), whose sum is σ = 135191040. Its totient is φ = 120960216.

The previous prime is 128055821. The next prime is 128055841. The reversal of 128055839 is 938550821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128055839 - 2⁸ = 128055583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128055796 and 128055805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128055859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119 + ... + 16304.

It is an arithmetic number, because the mean of its divisors is an integer number (16898880).

Almost surely, 2^128055839 is an apocalyptic number.

128055839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128055839 is a deficient number, since it is larger than the sum of its proper divisors (7135201).

128055839 is a wasteful number, since it uses less digits than its factorization.

128055839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19789.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 128055839 is about 11316.1759883805. The cubic root of 128055839 is about 504.0416933993.

The spelling of 128055839 in words is "one hundred twenty-eight million, fifty-five thousand, eight hundred thirty-nine".