128543880 has 64 divisors (see below), whose sum is σ = 387192960. Its totient is φ = 34139648.

The previous prime is 128543869. The next prime is 128543917. The reversal of 128543880 is 88345821.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29524 + ... + 33596.

It is an arithmetic number, because the mean of its divisors is an integer number (6049890).

Almost surely, 2^128543880 is an apocalyptic number.

128543880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128543880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193596480).

128543880 is an abundant number, since it is smaller than the sum of its proper divisors (258649080).

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

128543880 is a wasteful number, since it uses less digits than its factorization.

128543880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350 (or 4346 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 128543880 is about 11337.7193473820. The cubic root of 128543880 is about 504.6812091188.

The spelling of 128543880 in words is "one hundred twenty-eight million, five hundred forty-three thousand, eight hundred eighty".