128320118 has 4 divisors (see below), whose sum is σ = 192480180. Its totient is φ = 64160058.

The previous prime is 128320109. The next prime is 128320163. The reversal of 128320118 is 811023821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 811023821 = 1637 ⋅495433.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 32080028 + ... + 32080031.

It is an arithmetic number, because the mean of its divisors is an integer number (48120045).

Almost surely, 2^128320118 is an apocalyptic number.

128320118 is a deficient number, since it is larger than the sum of its proper divisors (64160062).

128320118 is an equidigital number, since it uses as much as digits as its factorization.

128320118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64160061.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 128320118 is about 11327.8470152099. The cubic root of 128320118 is about 504.3881987561.

Adding to 128320118 its reverse (811023821), we get a palindrome (939343939).

The spelling of 128320118 in words is "one hundred twenty-eight million, three hundred twenty thousand, one hundred eighteen".