28499389543 has 24 divisors (see below), whose sum is σ = 31478651568. Its totient is φ = 25703338752.

The previous prime is 28499389487. The next prime is 28499389553. The reversal of 28499389543 is 34598399482.

It is not a de Polignac number, because 28499389543 - 2¹⁷ = 28499258471 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 (28499389553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1657396 + ... + 1674502.

It is an arithmetic number, because the mean of its divisors is an integer number (1311610482).

Almost surely, 2^28499389543 is an apocalyptic number.

28499389543 is a deficient number, since it is larger than the sum of its proper divisors (2979262025).

28499389543 is a wasteful number, since it uses less digits than its factorization.

28499389543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17263 (or 17220 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 64.

It can be divided in two parts, 2849938 and 9543, that added together give a square (2859481 = 1691²).

The spelling of 28499389543 in words is "twenty-eight billion, four hundred ninety-nine million, three hundred eighty-nine thousand, five hundred forty-three".