128856300028 has 24 divisors (see below), whose sum is σ = 225849254400. Its totient is φ = 64327995648.

The previous prime is 128856300019. The next prime is 128856300043. The reversal of 128856300028 is 820003658821.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 18302533 + ... + 18309571.

It is an arithmetic number, because the mean of its divisors is an integer number (9410385600).

Almost surely, 2^128856300028 is an apocalyptic number.

It is an amenable number.

128856300028 is a deficient number, since it is larger than the sum of its proper divisors (96992954372).

128856300028 is a wasteful number, since it uses less digits than its factorization.

128856300028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13509 (or 13507 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

Adding to 128856300028 its reverse (820003658821), we get a palindrome (948859958849).

The spelling of 128856300028 in words is "one hundred twenty-eight billion, eight hundred fifty-six million, three hundred thousand, twenty-eight".