128112227388 has 36 divisors (see below), whose sum is σ = 323885441880. Its totient is φ = 42697983456.

The previous prime is 128112227329. The next prime is 128112227423. The reversal of 128112227388 is 883722211821.

128112227388 is a `hidden beast` number, since 1 + 281 + 1 + 22 + 273 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 5631 + ... + 506217.

It is an arithmetic number, because the mean of its divisors is an integer number (8996817830).

Almost surely, 2^128112227388 is an apocalyptic number.

128112227388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128112227388 is an abundant number, since it is smaller than the sum of its proper divisors (195773214492).

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

128112227388 is a wasteful number, since it uses less digits than its factorization.

128112227388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507706 (or 507701 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The spelling of 128112227388 in words is "one hundred twenty-eight billion, one hundred twelve million, two hundred twenty-seven thousand, three hundred eighty-eight".