128559838 has 12 divisors (see below), whose sum is σ = 211964760. Its totient is φ = 58436180.

The previous prime is 128559803. The next prime is 128559853. The reversal of 128559838 is 838955821.

It is a junction number, because it is equal to n+sod(n) for n = 128559791 and 128559800.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 265378 + ... + 265861.

It is an arithmetic number, because the mean of its divisors is an integer number (17663730).

Almost surely, 2^128559838 is an apocalyptic number.

128559838 is a deficient number, since it is larger than the sum of its proper divisors (83404922).

128559838 is a wasteful number, since it uses less digits than its factorization.

128559838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531263 (or 531252 counting only the distinct ones).

The product of its digits is 691200, while the sum is 49.

The square root of 128559838 is about 11338.4230825984. The cubic root of 128559838 is about 504.7020926995.

The spelling of 128559838 in words is "one hundred twenty-eight million, five hundred fifty-nine thousand, eight hundred thirty-eight".