128239396 has 6 divisors (see below), whose sum is σ = 224418950. Its totient is φ = 64119696.

The previous prime is 128239387. The next prime is 128239403. The reversal of 128239396 is 693932821.

It can be written as a sum of positive squares in only one way, i.e., 118504996 + 9734400 = 10886^2 + 3120^2 .

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, 16029921 + ... + 16029928.

Almost surely, 2^128239396 is an apocalyptic number.

It is an amenable number.

128239396 is a deficient number, since it is larger than the sum of its proper divisors (96179554).

128239396 is a wasteful number, since it uses less digits than its factorization.

128239396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32059853 (or 32059851 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 128239396 is about 11324.2834651911. The cubic root of 128239396 is about 504.2824118503.

The spelling of 128239396 in words is "one hundred twenty-eight million, two hundred thirty-nine thousand, three hundred ninety-six".