128758120 has 16 divisors (see below), whose sum is σ = 289705860. Its totient is φ = 51503232.

The previous prime is 128758099. The next prime is 128758139. The reversal of 128758120 is 21857821.

It can be written as a sum of positive squares in 2 ways, for example, as 123254404 + 5503716 = 11102^2 + 2346^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1609437 + ... + 1609516.

Almost surely, 2^128758120 is an apocalyptic number.

128758120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128758120 is an abundant number, since it is smaller than the sum of its proper divisors (160947740).

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

128758120 is a wasteful number, since it uses less digits than its factorization.

128758120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218964 (or 3218960 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 128758120 is about 11347.1635222200. The cubic root of 128758120 is about 504.9614322080.

The spelling of 128758120 in words is "one hundred twenty-eight million, seven hundred fifty-eight thousand, one hundred twenty".