28443573 has 6 divisors (see below), whose sum is σ = 41085174. Its totient is φ = 18962376.

The previous prime is 28443559. The next prime is 28443581. The reversal of 28443573 is 37534482.

It is a happy number.

28443573 is a `hidden beast` number, since 2 + 84 + 4 + 3 + 573 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15069924 + 13373649 = 3882^2 + 3657^2 .

It is not a de Polignac number, because 28443573 - 2⁴ = 28443557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28443593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1580190 + ... + 1580207.

It is an arithmetic number, because the mean of its divisors is an integer number (6847529).

Almost surely, 2^28443573 is an apocalyptic number.

It is an amenable number.

28443573 is a deficient number, since it is larger than the sum of its proper divisors (12641601).

28443573 is a wasteful number, since it uses less digits than its factorization.

28443573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160403 (or 3160400 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 28443573 is about 5333.2516347909. The cubic root of 28443573 is about 305.2540139568.

Subtracting 28443573 from its reverse (37534482), we obtain a palindrome (9090909).

The spelling of 28443573 in words is "twenty-eight million, four hundred forty-three thousand, five hundred seventy-three".