128338443 has 12 divisors (see below), whose sum is σ = 185825640. Its totient is φ = 85352256.

The previous prime is 128338421. The next prime is 128338471. The reversal of 128338443 is 344833821.

It is a happy number.

It is not a de Polignac number, because 128338443 - 2¹² = 128334347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128338398 and 128338407.

It is not an unprimeable number, because it can be changed into a prime (128338403) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 13246 + ... + 20787.

It is an arithmetic number, because the mean of its divisors is an integer number (15485470).

Almost surely, 2^128338443 is an apocalyptic number.

128338443 is a deficient number, since it is larger than the sum of its proper divisors (57487197).

128338443 is a wasteful number, since it uses less digits than its factorization.

128338443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34458 (or 34455 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 128338443 is about 11328.6558337695. The cubic root of 128338443 is about 504.4122076539.

The spelling of 128338443 in words is "one hundred twenty-eight million, three hundred thirty-eight thousand, four hundred forty-three".