28443432 has 32 divisors (see below), whose sum is σ = 73562400. Its totient is φ = 9153984.

The previous prime is 28443379. The next prime is 28443439. The reversal of 28443432 is 23434482.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28443432.

It is not an unprimeable number, because it can be changed into a prime (28443439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19738 + ... + 21129.

It is an arithmetic number, because the mean of its divisors is an integer number (2298825).

Almost surely, 2^28443432 is an apocalyptic number.

It is an amenable number.

28443432 is an abundant number, since it is smaller than the sum of its proper divisors (45118968).

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

28443432 is a wasteful number, since it uses less digits than its factorization.

28443432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40905 (or 40901 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 28443432 is about 5333.2384158220. The cubic root of 28443432 is about 305.2535095559.

The spelling of 28443432 in words is "twenty-eight million, four hundred forty-three thousand, four hundred thirty-two".