128862308872 has 32 divisors (see below), whose sum is σ = 279086821920. Its totient is φ = 55128259840.

The previous prime is 128862308851. The next prime is 128862308899. The reversal of 128862308872 is 278803268821.

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 7 ways as a sum of consecutive naturals, for example, 43067458 + ... + 43070449.

It is an arithmetic number, because the mean of its divisors is an integer number (8721463185).

Almost surely, 2^128862308872 is an apocalyptic number.

It is an amenable number.

128862308872 is an abundant number, since it is smaller than the sum of its proper divisors (150224513048).

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

128862308872 is a wasteful number, since it uses less digits than its factorization.

128862308872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86137941 (or 86137937 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 55.

It can be divided in two parts, 128862 and 308872, that added together give a palindrome (437734).

The spelling of 128862308872 in words is "one hundred twenty-eight billion, eight hundred sixty-two million, three hundred eight thousand, eight hundred seventy-two".