128988512 has 24 divisors (see below), whose sum is σ = 260811936. Its totient is φ = 62750592.

The previous prime is 128988499. The next prime is 128988521. The reversal of 128988512 is 215889821.

It is a congruent number.

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, 53288 + ... + 55655.

It is an arithmetic number, because the mean of its divisors is an integer number (10867164).

Almost surely, 2^128988512 is an apocalyptic number.

It is an amenable number.

128988512 is an abundant number, since it is smaller than the sum of its proper divisors (131823424).

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

128988512 is a wasteful number, since it uses less digits than its factorization.

128988512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108990 (or 108982 counting only the distinct ones).

The product of its digits is 92160, while the sum is 44.

The square root of 128988512 is about 11357.3109493401. The cubic root of 128988512 is about 505.2624352390.

The spelling of 128988512 in words is "one hundred twenty-eight million, nine hundred eighty-eight thousand, five hundred twelve".