28443632 has 40 divisors (see below), whose sum is σ = 63314400. Its totient is φ = 12125952.

The previous prime is 28443593. The next prime is 28443643. The reversal of 28443632 is 23634482.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25094 + ... + 26202.

It is an arithmetic number, because the mean of its divisors is an integer number (1582860).

Almost surely, 2^28443632 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 28443632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31657200).

28443632 is an abundant number, since it is smaller than the sum of its proper divisors (34870768).

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

28443632 is a wasteful number, since it uses less digits than its factorization.

28443632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353 (or 1347 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 28443632 is about 5333.2571661228. The cubic root of 28443632 is about 305.2542250176.

The spelling of 28443632 in words is "twenty-eight million, four hundred forty-three thousand, six hundred thirty-two".