128838128 has 20 divisors (see below), whose sum is σ = 249857520. Its totient is φ = 64358784.

The previous prime is 128838103. The next prime is 128838169. The reversal of 128838128 is 821838821.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 17501 + ... + 23747.

It is an arithmetic number, because the mean of its divisors is an integer number (12492876).

Almost surely, 2^128838128 is an apocalyptic number.

It is an amenable number.

128838128 is a deficient number, since it is larger than the sum of its proper divisors (121019392).

128838128 is a wasteful number, since it uses less digits than its factorization.

128838128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7544 (or 7538 counting only the distinct ones).

The product of its digits is 49152, while the sum is 41.

The square root of 128838128 is about 11350.6884372711. The cubic root of 128838128 is about 505.0660018952.

The spelling of 128838128 in words is "one hundred twenty-eight million, eight hundred thirty-eight thousand, one hundred twenty-eight".