128338422 has 32 divisors (see below), whose sum is σ = 265574400. Its totient is φ = 41313888.

The previous prime is 128338421. The next prime is 128338471. The reversal of 128338422 is 224833821.

It is a super-2 number, since 2×128338422² = 32941501122900168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128338421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28779 + ... + 32937.

It is an arithmetic number, because the mean of its divisors is an integer number (8299200).

Almost surely, 2^128338422 is an apocalyptic number.

128338422 is an abundant number, since it is smaller than the sum of its proper divisors (137235978).

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

128338422 is a wasteful number, since it uses less digits than its factorization.

128338422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340.

The product of its digits is 18432, while the sum is 33.

The square root of 128338422 is about 11328.6549069164. The cubic root of 128338422 is about 504.4121801416.

The spelling of 128338422 in words is "one hundred twenty-eight million, three hundred thirty-eight thousand, four hundred twenty-two".