28871444585743 has 4 divisors (see below), whose sum is σ = 28948847922808. Its totient is φ = 28794041248680.

The previous prime is 28871444585719. The next prime is 28871444585747. The reversal of 28871444585743 is 34758544417882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28871444585743 - 2²¹ = 28871442488591 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 (28871444585747) 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, 38701667973 + ... + 38701668718.

It is an arithmetic number, because the mean of its divisors is an integer number (7237211980702).

Almost surely, 2^{28871444585743} is an apocalyptic number.

28871444585743 is a deficient number, since it is larger than the sum of its proper divisors (77403337065).

28871444585743 is an equidigital number, since it uses as much as digits as its factorization.

28871444585743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77403337064.

The product of its digits is 963379200, while the sum is 70.

The spelling of 28871444585743 in words is "twenty-eight trillion, eight hundred seventy-one billion, four hundred forty-four million, five hundred eighty-five thousand, seven hundred forty-three".