28443524 has 12 divisors (see below), whose sum is σ = 49815948. Its totient is φ = 14210400.

The previous prime is 28443521. The next prime is 28443557. The reversal of 28443524 is 42534482.

It can be written as a sum of positive squares in 2 ways, for example, as 10125124 + 18318400 = 3182^2 + 4280^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28443521) 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, 5534 + ... + 9354.

It is an arithmetic number, because the mean of its divisors is an integer number (4151329).

Almost surely, 2^28443524 is an apocalyptic number.

It is an amenable number.

28443524 is a deficient number, since it is larger than the sum of its proper divisors (21372424).

28443524 is a wasteful number, since it uses less digits than its factorization.

28443524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5686 (or 5684 counting only the distinct ones).

The product of its digits is 30720, while the sum is 32.

The square root of 28443524 is about 5333.2470409686. The cubic root of 28443524 is about 305.2538386687.

The spelling of 28443524 in words is "twenty-eight million, four hundred forty-three thousand, five hundred twenty-four".