128938308 has 12 divisors (see below), whose sum is σ = 300856080. Its totient is φ = 42979432.

The previous prime is 128938301. The next prime is 128938339. The reversal of 128938308 is 803839821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 128938308.

It is not an unprimeable number, because it can be changed into a prime (128938301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5372418 + ... + 5372441.

It is an arithmetic number, because the mean of its divisors is an integer number (25071340).

Almost surely, 2^128938308 is an apocalyptic number.

It is an amenable number.

128938308 is an abundant number, since it is smaller than the sum of its proper divisors (171917772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128938308 is a wasteful number, since it uses less digits than its factorization.

128938308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10744866 (or 10744864 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 128938308 is about 11355.1005279566. The cubic root of 128938308 is about 505.1968751707.

The spelling of 128938308 in words is "one hundred twenty-eight million, nine hundred thirty-eight thousand, three hundred eight".