128752508 has 12 divisors (see below), whose sum is σ = 225406272. Its totient is φ = 64350720.

The previous prime is 128752501. The next prime is 128752511. The reversal of 128752508 is 805257821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128752501) 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, 9173 + ... + 18483.

It is an arithmetic number, because the mean of its divisors is an integer number (18783856).

Almost surely, 2^128752508 is an apocalyptic number.

It is an amenable number.

128752508 is a deficient number, since it is larger than the sum of its proper divisors (96653764).

128752508 is a wasteful number, since it uses less digits than its factorization.

128752508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12772 (or 12770 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 128752508 is about 11346.9162330565. The cubic root of 128752508 is about 504.9540957523.

The spelling of 128752508 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, five hundred eight".