128404232 has 64 divisors (see below), whose sum is σ = 274060800. Its totient is φ = 56337600.

The previous prime is 128404219. The next prime is 128404249. The reversal of 128404232 is 232404821.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329894 + ... + 330282.

It is an arithmetic number, because the mean of its divisors is an integer number (4282200).

Almost surely, 2^128404232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128404232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137030400).

128404232 is an abundant number, since it is smaller than the sum of its proper divisors (145656568).

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

128404232 is a wasteful number, since it uses less digits than its factorization.

128404232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 128404232 is about 11331.5591160264. The cubic root of 128404232 is about 504.4983837187.

The spelling of 128404232 in words is "one hundred twenty-eight million, four hundred four thousand, two hundred thirty-two".