28545844 has 6 divisors (see below), whose sum is σ = 49955234. Its totient is φ = 14272920.

The previous prime is 28545841. The next prime is 28545859. The reversal of 28545844 is 44854582.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20593444 + 7952400 = 4538^2 + 2820^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28545797 and 28545806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3568227 + ... + 3568234.

Almost surely, 2^28545844 is an apocalyptic number.

It is an amenable number.

28545844 is a deficient number, since it is larger than the sum of its proper divisors (21409390).

28545844 is a wasteful number, since it uses less digits than its factorization.

28545844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136465 (or 7136463 counting only the distinct ones).

The product of its digits is 204800, while the sum is 40.

The square root of 28545844 is about 5342.8310847340. The cubic root of 28545844 is about 305.6194309118.

The spelling of 28545844 in words is "twenty-eight million, five hundred forty-five thousand, eight hundred forty-four".