128338383 has 4 divisors (see below), whose sum is σ = 171117848. Its totient is φ = 85558920.

The previous prime is 128338381. The next prime is 128338403. The reversal of 128338383 is 383833821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 128338383 - 2¹ = 128338381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128338381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21389728 + ... + 21389733.

It is an arithmetic number, because the mean of its divisors is an integer number (42779462).

Almost surely, 2^128338383 is an apocalyptic number.

128338383 is a deficient number, since it is larger than the sum of its proper divisors (42779465).

128338383 is an equidigital number, since it uses as much as digits as its factorization.

128338383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42779464.

The product of its digits is 82944, while the sum is 39.

The square root of 128338383 is about 11328.6531856174. The cubic root of 128338383 is about 504.4121290473.

The spelling of 128338383 in words is "one hundred twenty-eight million, three hundred thirty-eight thousand, three hundred eighty-three".