28563572 has 12 divisors (see below), whose sum is σ = 50044260. Its totient is φ = 14265216.

The previous prime is 28563551. The next prime is 28563581. The reversal of 28563572 is 27536582.

It can be written as a sum of positive squares in 2 ways, for example, as 20757136 + 7806436 = 4556^2 + 2794^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254 + ... + 7562.

It is an arithmetic number, because the mean of its divisors is an integer number (4170355).

Almost surely, 2^28563572 is an apocalyptic number.

It is an amenable number.

28563572 is a deficient number, since it is larger than the sum of its proper divisors (21480688).

28563572 is a wasteful number, since it uses less digits than its factorization.

28563572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8290 (or 8288 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 28563572 is about 5344.4898727568. The cubic root of 28563572 is about 305.6826847205.

The spelling of 28563572 in words is "twenty-eight million, five hundred sixty-three thousand, five hundred seventy-two".