28565746973 has 18 divisors (see below), whose sum is σ = 30422405754. Its totient is φ = 26818468992.

The previous prime is 28565746949. The next prime is 28565747009. The reversal of 28565746973 is 37964756582.

It can be written as a sum of positive squares in 3 ways, for example, as 2716181689 + 25849565284 = 52117^2 + 160778^2 .

It is not a de Polignac number, because 28565746973 - 2⁸ = 28565746717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28565745973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4606511 + ... + 4612707.

It is an arithmetic number, because the mean of its divisors is an integer number (1690133653).

Almost surely, 2^28565746973 is an apocalyptic number.

It is an amenable number.

28565746973 is a deficient number, since it is larger than the sum of its proper divisors (1856658781).

28565746973 is an equidigital number, since it uses as much as digits as its factorization.

28565746973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461 (or 6329 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 62.

The spelling of 28565746973 in words is "twenty-eight billion, five hundred sixty-five million, seven hundred forty-six thousand, nine hundred seventy-three".