128972528 has 20 divisors (see below), whose sum is σ = 256639080. Its totient is φ = 62743104.

The previous prime is 128972527. The next prime is 128972533. The reversal of 128972528 is 825279821.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128972527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108338 + ... + 109521.

It is an arithmetic number, because the mean of its divisors is an integer number (12831954).

Almost surely, 2^128972528 is an apocalyptic number.

It is an amenable number.

128972528 is a deficient number, since it is larger than the sum of its proper divisors (127666552).

128972528 is a wasteful number, since it uses less digits than its factorization.

128972528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217904 (or 217898 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The square root of 128972528 is about 11356.6072398406. The cubic root of 128972528 is about 505.2415640046.

The spelling of 128972528 in words is "one hundred twenty-eight million, nine hundred seventy-two thousand, five hundred twenty-eight".