128870867688 has 32 divisors (see below), whose sum is σ = 330884662560. Its totient is φ = 41795956800.

The previous prime is 128870867639. The next prime is 128870867737. The reversal of 128870867688 is 886768078821.

128870867688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (128870867639) and next prime (128870867737).

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, 72561538 + ... + 72563313.

It is an arithmetic number, because the mean of its divisors is an integer number (10340145705).

Almost surely, 2^128870867688 is an apocalyptic number.

It is an amenable number.

128870867688 is an abundant number, since it is smaller than the sum of its proper divisors (202013794872).

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

128870867688 is a wasteful number, since it uses less digits than its factorization.

128870867688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145124897 (or 145124893 counting only the distinct ones).

The product of its (nonzero) digits is 115605504, while the sum is 69.

The spelling of 128870867688 in words is "one hundred twenty-eight billion, eight hundred seventy million, eight hundred sixty-seven thousand, six hundred eighty-eight".