128872528 has 10 divisors (see below), whose sum is σ = 249690554. Its totient is φ = 64436256.

The previous prime is 128872511. The next prime is 128872531. The reversal of 128872528 is 825278821.

It can be written as a sum of positive squares in only one way, i.e., 128867904 + 4624 = 11352^2 + 68^2 .

It is a super-2 number, since 2×128872528² = 33216256946221568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4027251 + ... + 4027282.

Almost surely, 2^128872528 is an apocalyptic number.

It is an amenable number.

128872528 is a deficient number, since it is larger than the sum of its proper divisors (120818026).

128872528 is an equidigital number, since it uses as much as digits as its factorization.

128872528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054541 (or 8054535 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 128872528 is about 11352.2036627256. The cubic root of 128872528 is about 505.1109490566.

The spelling of 128872528 in words is "one hundred twenty-eight million, eight hundred seventy-two thousand, five hundred twenty-eight".