128163888 has 30 divisors (see below), whose sum is σ = 358681284. Its totient is φ = 42721248.

The previous prime is 128163883. The next prime is 128163913. The reversal of 128163888 is 888361821.

128163888 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 638 + 8 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (128163883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444870 + ... + 445157.

Almost surely, 2^128163888 is an apocalyptic number.

128163888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128163888 is an abundant number, since it is smaller than the sum of its proper divisors (230517396).

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

128163888 is a wasteful number, since it uses less digits than its factorization.

128163888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890041 (or 890032 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 128163888 is about 11320.9490768221. The cubic root of 128163888 is about 504.1834177467.

The spelling of 128163888 in words is "one hundred twenty-eight million, one hundred sixty-three thousand, eight hundred eighty-eight".