128641528 has 16 divisors (see below), whose sum is σ = 241352280. Its totient is φ = 64280928.

The previous prime is 128641523. The next prime is 128641613. The reversal of 128641528 is 825146821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128641523) 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, 12250 + ... + 20182.

Almost surely, 2^128641528 is an apocalyptic number.

It is an amenable number.

128641528 is a deficient number, since it is larger than the sum of its proper divisors (112710752).

128641528 is a wasteful number, since it uses less digits than its factorization.

128641528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9966 (or 9962 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 128641528 is about 11342.0248633125. The cubic root of 128641528 is about 504.8089699976.

The spelling of 128641528 in words is "one hundred twenty-eight million, six hundred forty-one thousand, five hundred twenty-eight".