128311880 has 64 divisors (see below), whose sum is σ = 297665280. Its totient is φ = 49753600.

The previous prime is 128311877. The next prime is 128311907. The reversal of 128311880 is 88113821.

It is a happy number.

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, 246020 + ... + 246540.

It is an arithmetic number, because the mean of its divisors is an integer number (4651020).

Almost surely, 2^128311880 is an apocalyptic number.

128311880 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 128311880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148832640).

128311880 is an abundant number, since it is smaller than the sum of its proper divisors (169353400).

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

128311880 is a wasteful number, since it uses less digits than its factorization.

128311880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 128311880 is about 11327.4833921750. The cubic root of 128311880 is about 504.3774048163.

The spelling of 128311880 in words is "one hundred twenty-eight million, three hundred eleven thousand, eight hundred eighty".