128128018 has 8 divisors (see below), whose sum is σ = 192371148. Its totient is φ = 64004304.

The previous prime is 128127973. The next prime is 128128027. The reversal of 128128018 is 810821821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75463969 + 52664049 = 8687^2 + 7257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 27121 + ... + 31492.

Almost surely, 2^128128018 is an apocalyptic number.

128128018 is a deficient number, since it is larger than the sum of its proper divisors (64243130).

128128018 is a wasteful number, since it uses less digits than its factorization.

128128018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59708.

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 128128018 is about 11319.3647348250. The cubic root of 128128018 is about 504.1363770736.

Adding to 128128018 its reverse (810821821), we get a palindrome (938949839).

It can be divided in two parts, 128 and 128018, that multiplied together give a square (16386304 = 4048²).

The spelling of 128128018 in words is "one hundred twenty-eight million, one hundred twenty-eight thousand, eighteen".