128938228 has 12 divisors (see below), whose sum is σ = 225721440. Its totient is φ = 64446392.

The previous prime is 128938223. The next prime is 128938231. The reversal of 128938228 is 822839821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128938223) 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 3 ways as a sum of consecutive naturals, for example, 18993 + ... + 24871.

It is an arithmetic number, because the mean of its divisors is an integer number (18810120).

Almost surely, 2^128938228 is an apocalyptic number.

It is an amenable number.

128938228 is a deficient number, since it is larger than the sum of its proper divisors (96783212).

128938228 is a wasteful number, since it uses less digits than its factorization.

128938228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11366 (or 11364 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 128938228 is about 11355.0970053100. The cubic root of 128938228 is about 505.1967706872.

The spelling of 128938228 in words is "one hundred twenty-eight million, nine hundred thirty-eight thousand, two hundred twenty-eight".