28563044 has 12 divisors (see below), whose sum is σ = 50087100. Its totient is φ = 14252448.

The previous prime is 28563011. The next prime is 28563049. The reversal of 28563044 is 44036582.

It can be written as a sum of positive squares in 2 ways, for example, as 10176100 + 18386944 = 3190^2 + 4288^2 .

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 self number, because there is not a number n which added to its sum of digits gives 28563044.

It is not an unprimeable number, because it can be changed into a prime (28563049) 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, 4979 + ... + 9050.

It is an arithmetic number, because the mean of its divisors is an integer number (4173925).

Almost surely, 2^28563044 is an apocalyptic number.

It is an amenable number.

28563044 is a deficient number, since it is larger than the sum of its proper divisors (21524056).

28563044 is a wasteful number, since it uses less digits than its factorization.

28563044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14542 (or 14540 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 28563044 is about 5344.4404758590. The cubic root of 28563044 is about 305.6808011856.

The spelling of 28563044 in words is "twenty-eight million, five hundred sixty-three thousand, forty-four".