128971328 has 14 divisors (see below), whose sum is σ = 255927606. Its totient is φ = 64485632.

The previous prime is 128971321. The next prime is 128971343. The reversal of 128971328 is 823179821.

It can be written as a sum of positive squares in only one way, i.e., 121176064 + 7795264 = 11008^2 + 2792^2 .

It is not an unprimeable number, because it can be changed into a prime (128971321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007525 + ... + 1007652.

Almost surely, 2^128971328 is an apocalyptic number.

It is an amenable number.

128971328 is a deficient number, since it is larger than the sum of its proper divisors (126956278).

128971328 is an equidigital number, since it uses as much as digits as its factorization.

128971328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015189 (or 2015179 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 128971328 is about 11356.5544070374. The cubic root of 128971328 is about 505.2399970256.

The spelling of 128971328 in words is "one hundred twenty-eight million, nine hundred seventy-one thousand, three hundred twenty-eight".