128236422 has 8 divisors (see below), whose sum is σ = 256472856. Its totient is φ = 42745472.

The previous prime is 128236421. The next prime is 128236481. The reversal of 128236422 is 224632821.

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

128236422 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 128236422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128236421) 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, 10686363 + ... + 10686374.

It is an arithmetic number, because the mean of its divisors is an integer number (32059107).

Almost surely, 2^128236422 is an apocalyptic number.

128236422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128236422 is a wasteful number, since it uses less digits than its factorization.

128236422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21372742.

The product of its digits is 9216, while the sum is 30.

The square root of 128236422 is about 11324.1521536934. The cubic root of 128236422 is about 504.2785135488.

The spelling of 128236422 in words is "one hundred twenty-eight million, two hundred thirty-six thousand, four hundred twenty-two".