128838233 has 8 divisors (see below), whose sum is σ = 133436160. Its totient is φ = 124317760.

The previous prime is 128838169. The next prime is 128838239. The reversal of 128838233 is 332838821.

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

It is a cyclic number.

It is not a de Polignac number, because 128838233 - 2⁶ = 128838169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128838239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15968 + ... + 22641.

It is an arithmetic number, because the mean of its divisors is an integer number (16679520).

Almost surely, 2^128838233 is an apocalyptic number.

It is an amenable number.

128838233 is a deficient number, since it is larger than the sum of its proper divisors (4597927).

128838233 is an equidigital number, since it uses as much as digits as its factorization.

128838233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38727.

The product of its digits is 55296, while the sum is 38.

The square root of 128838233 is about 11350.6930625403. The cubic root of 128838233 is about 505.0661391008.

The spelling of 128838233 in words is "one hundred twenty-eight million, eight hundred thirty-eight thousand, two hundred thirty-three".