128018 has 18 divisors (see below), whose sum is σ = 220647. Its totient is φ = 55660.

The previous prime is 127997. The next prime is 128021. The reversal of 128018 is 810821.

It can be written as a sum of positive squares in only one way, i.e., 64009 + 64009 = 253^2 + 253^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=253.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is an unprimeable number.

128018 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5555 + ... + 5577.

2¹²⁸⁰¹⁸ is an apocalyptic number.

128018 is a deficient number, since it is larger than the sum of its proper divisors (92629).

128018 is a wasteful number, since it uses less digits than its factorization.

128018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 128018 is about 357.7960312804. The cubic root of 128018 is about 50.3992042370.

Multiplying 128018 by its product of nonzero digits (128), we get a square (16386304 = 4048²).

Adding to 128018 its reverse (810821), we get a palindrome (938839).

The spelling of 128018 in words is "one hundred twenty-eight thousand, eighteen".