28443284 has 12 divisors (see below), whose sum is σ = 49816704. Its totient is φ = 14209944.

The previous prime is 28443281. The next prime is 28443307. The reversal of 28443284 is 48234482.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28443281) 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, 4829 + ... + 8955.

It is an arithmetic number, because the mean of its divisors is an integer number (4151392).

Almost surely, 2^28443284 is an apocalyptic number.

It is an amenable number.

28443284 is a deficient number, since it is larger than the sum of its proper divisors (21373420).

28443284 is a wasteful number, since it uses less digits than its factorization.

28443284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5854 (or 5852 counting only the distinct ones).

The product of its digits is 49152, while the sum is 35.

The square root of 28443284 is about 5333.2245405571. The cubic root of 28443284 is about 305.2529801121.

The spelling of 28443284 in words is "twenty-eight million, four hundred forty-three thousand, two hundred eighty-four".