128970864 has 60 divisors (see below), whose sum is σ = 393756792. Its totient is φ = 39081600.

The previous prime is 128970817. The next prime is 128970869. The reversal of 128970864 is 468079821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128970869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39127 + ... + 42294.

Almost surely, 2^128970864 is an apocalyptic number.

It is an amenable number.

128970864 is an abundant number, since it is smaller than the sum of its proper divisors (264785928).

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

128970864 is a wasteful number, since it uses less digits than its factorization.

128970864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81446 (or 81437 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 128970864 is about 11356.5339782876. The cubic root of 128970864 is about 505.2393911244.

The spelling of 128970864 in words is "one hundred twenty-eight million, nine hundred seventy thousand, eight hundred sixty-four".