128394234 has 80 divisors (see below), whose sum is σ = 318022848. Its totient is φ = 38510208.

The previous prime is 128394179. The next prime is 128394263. The reversal of 128394234 is 432493821.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 62329 + ... + 64355.

Almost surely, 2^128394234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128394234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159011424).

128394234 is an abundant number, since it is smaller than the sum of its proper divisors (189628614).

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

128394234 is a wasteful number, since it uses less digits than its factorization.

128394234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2072 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 128394234 is about 11331.1179501407. The cubic root of 128394234 is about 504.4852893794.

The spelling of 128394234 in words is "one hundred twenty-eight million, three hundred ninety-four thousand, two hundred thirty-four".