128488880 has 40 divisors (see below), whose sum is σ = 321718992. Its totient is φ = 47441664.

The previous prime is 128488847. The next prime is 128488889. The reversal of 128488880 is 88884821.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (128488889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60734 + ... + 62813.

Almost surely, 2^128488880 is an apocalyptic number.

128488880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128488880 is an abundant number, since it is smaller than the sum of its proper divisors (193230112).

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

128488880 is a wasteful number, since it uses less digits than its factorization.

128488880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123573 (or 123567 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 47.

The square root of 128488880 is about 11335.2935559693. The cubic root of 128488880 is about 504.6092196256.

The spelling of 128488880 in words is "one hundred twenty-eight million, four hundred eighty-eight thousand, eight hundred eighty".