128432 has 20 divisors (see below), whose sum is σ = 260400. Its totient is φ = 61248.

The previous prime is 128431. The next prime is 128437. The reversal of 128432 is 234821.

128432 is a modest number, since divided by 432 gives 128 as remainder.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128432.

It is not an unprimeable number, because it can be changed into a prime (128431) 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, 194 + ... + 542.

It is an arithmetic number, because the mean of its divisors is an integer number (13020).

2¹²⁸⁴³² 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 128432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130200).

128432 is an abundant number, since it is smaller than the sum of its proper divisors (131968).

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

128432 is a wasteful number, since it uses less digits than its factorization.

128432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 374 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 128432 is about 358.3741062075. The cubic root of 128432 is about 50.4534747789.

The spelling of 128432 in words is "one hundred twenty-eight thousand, four hundred thirty-two".