128068839 has 12 divisors (see below), whose sum is σ = 185296176. Its totient is φ = 85237152.

The previous prime is 128068819. The next prime is 128068847. The reversal of 128068839 is 938860821.

It is not a de Polignac number, because 128068839 - 2¹¹ = 128066791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128068794 and 128068803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128068819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5979 + ... + 17084.

It is an arithmetic number, because the mean of its divisors is an integer number (15441348).

Almost surely, 2^128068839 is an apocalyptic number.

128068839 is a deficient number, since it is larger than the sum of its proper divisors (57227337).

128068839 is a wasteful number, since it uses less digits than its factorization.

128068839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23686 (or 23683 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 128068839 is about 11316.7503727881. The cubic root of 128068839 is about 504.0587492929.

The spelling of 128068839 in words is "one hundred twenty-eight million, sixty-eight thousand, eight hundred thirty-nine".