128158872 has 32 divisors (see below), whose sum is σ = 322850880. Its totient is φ = 42392480.

The previous prime is 128158871. The next prime is 128158879. The reversal of 128158872 is 278851821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128158871) by changing a digit.

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, 17238 + ... + 23525.

It is an arithmetic number, because the mean of its divisors is an integer number (10089090).

Almost surely, 2^128158872 is an apocalyptic number.

128158872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128158872 is an abundant number, since it is smaller than the sum of its proper divisors (194692008).

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

128158872 is a wasteful number, since it uses less digits than its factorization.

128158872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40903 (or 40899 counting only the distinct ones).

The product of its digits is 71680, while the sum is 42.

The square root of 128158872 is about 11320.7275384579. The cubic root of 128158872 is about 504.1768401866.

The spelling of 128158872 in words is "one hundred twenty-eight million, one hundred fifty-eight thousand, eight hundred seventy-two".