128304399428 has 12 divisors (see below), whose sum is σ = 224542490172. Its totient is φ = 64149402240.

The previous prime is 128304399409. The next prime is 128304399463. The reversal of 128304399428 is 824993403821.

128304399428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 67076856064 + 61227543364 = 258992^2 + 247442^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128304399428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594425 + ... + 780992.

It is an arithmetic number, because the mean of its divisors is an integer number (18711874181).

Almost surely, 2^128304399428 is an apocalyptic number.

It is an amenable number.

128304399428 is a deficient number, since it is larger than the sum of its proper divisors (96238090744).

128304399428 is a wasteful number, since it uses less digits than its factorization.

128304399428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398742 (or 1398740 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 128304399428 in words is "one hundred twenty-eight billion, three hundred four million, three hundred ninety-nine thousand, four hundred twenty-eight".