128758128 has 40 divisors (see below), whose sum is σ = 343358976. Its totient is φ = 41534400.

The previous prime is 128758099. The next prime is 128758139. The reversal of 128758128 is 821857821.

It is a self number, because there is not a number n which added to its sum of digits gives 128758128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41778 + ... + 44753.

Almost surely, 2^128758128 is an apocalyptic number.

It is an amenable number.

128758128 is an abundant number, since it is smaller than the sum of its proper divisors (214600848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128758128 is a wasteful number, since it uses less digits than its factorization.

128758128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86573 (or 86567 counting only the distinct ones).

The product of its digits is 71680, while the sum is 42.

The square root of 128758128 is about 11347.1638747310. The cubic root of 128758128 is about 504.9614426661.

The spelling of 128758128 in words is "one hundred twenty-eight million, seven hundred fifty-eight thousand, one hundred twenty-eight".