28536664848784 has 45 divisors (see below), whose sum is σ = 56672950447939. Its totient is φ = 13919896958720.

The previous prime is 28536664848779. The next prime is 28536664848817. The reversal of 28536664848784 is 48784846663582.

The square root of 28536664848784 is 5341972.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 25921742995600 + 2614921853184 = 5091340^2 + 1617072^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 876067122 + ... + 876099694.

Almost surely, 2^{28536664848784} is an apocalyptic number.

28536664848784 is the 5341972-nd square number.

It is an amenable number.

28536664848784 is a deficient number, since it is larger than the sum of its proper divisors (28136285599155).

28536664848784 is an frugal number, since it uses more digits than its factorization.

28536664848784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65236 (or 32616 counting only the distinct ones).

The product of its digits is 11890851840, while the sum is 79.

The spelling of 28536664848784 in words is "twenty-eight trillion, five hundred thirty-six billion, six hundred sixty-four million, eight hundred forty-eight thousand, seven hundred eighty-four".