128664338 has 8 divisors (see below), whose sum is σ = 210541680. Its totient is φ = 58483780.

The previous prime is 128664317. The next prime is 128664343. The reversal of 128664338 is 833466821.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 128664295 and 128664304.

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, 2924168 + ... + 2924211.

It is an arithmetic number, because the mean of its divisors is an integer number (26317710).

Almost surely, 2^128664338 is an apocalyptic number.

128664338 is a deficient number, since it is larger than the sum of its proper divisors (81877342).

128664338 is a wasteful number, since it uses less digits than its factorization.

128664338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848392.

The product of its digits is 165888, while the sum is 41.

The square root of 128664338 is about 11343.0303711134. The cubic root of 128664338 is about 504.8388048735.

It can be divided in two parts, 128 and 664338, that added together give a palindrome (664466).

The spelling of 128664338 in words is "one hundred twenty-eight million, six hundred sixty-four thousand, three hundred thirty-eight".