128017128 has 16 divisors (see below), whose sum is σ = 320042880. Its totient is φ = 42672368.

The previous prime is 128017111. The next prime is 128017133. The reversal of 128017128 is 821710821.

It is a happy number.

It is a super-2 number, since 2×128017128² = 32776770122736768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128017095 and 128017104.

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 3 ways as a sum of consecutive naturals, for example, 2667000 + ... + 2667047.

It is an arithmetic number, because the mean of its divisors is an integer number (20002680).

Almost surely, 2^128017128 is an apocalyptic number.

It is an amenable number.

128017128 is an abundant number, since it is smaller than the sum of its proper divisors (192025752).

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

128017128 is a wasteful number, since it uses less digits than its factorization.

128017128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334056 (or 5334052 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 128017128 is about 11314.4654314731. The cubic root of 128017128 is about 503.9908980468.

Adding to 128017128 its reverse (821710821), we get a palindrome (949727949).

The spelling of 128017128 in words is "one hundred twenty-eight million, seventeen thousand, one hundred twenty-eight".