28566651869284 has 9 divisors (see below), whose sum is σ = 49991659477977. Its totient is φ = 14283320589864.

The previous prime is 28566651869281. The next prime is 28566651869297. The reversal of 28566651869284 is 48296815666582.

The square root of 28566651869284 is 5344778.

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

It can be written as a sum of positive squares in only one way, i.e., 19050414043684 + 9516237825600 = 4364678^2 + 3084840^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28566651869284.

It is not an unprimeable number, because it can be changed into a prime (28566651869281) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9353362 + ... + 12025750.

Almost surely, 2^{28566651869284} is an apocalyptic number.

28566651869284 is the 5344778-th square number.

It is an amenable number.

28566651869284 is a deficient number, since it is larger than the sum of its proper divisors (21425007608693).

28566651869284 is an frugal number, since it uses more digits than its factorization.

28566651869284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344782 (or 2672391 counting only the distinct ones).

The product of its digits is 2388787200, while the sum is 76.

The spelling of 28566651869284 in words is "twenty-eight trillion, five hundred sixty-six billion, six hundred fifty-one million, eight hundred sixty-nine thousand, two hundred eighty-four".