128944988 has 12 divisors (see below), whose sum is σ = 226453080. Its totient is φ = 64244112.

The previous prime is 128944987. The next prime is 128945023. The reversal of 128944988 is 889449821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128944987) 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, 55823 + ... + 58086.

It is an arithmetic number, because the mean of its divisors is an integer number (18871090).

Almost surely, 2^128944988 is an apocalyptic number.

It is an amenable number.

128944988 is a deficient number, since it is larger than the sum of its proper divisors (97508092).

128944988 is a wasteful number, since it uses less digits than its factorization.

128944988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114196 (or 114194 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 53.

The square root of 128944988 is about 11355.3946650920. The cubic root of 128944988 is about 505.2055993864.

The spelling of 128944988 in words is "one hundred twenty-eight million, nine hundred forty-four thousand, nine hundred eighty-eight".