28939863573 has 64 divisors (see below), whose sum is σ = 44602700800. Its totient is φ = 18535495680.

The previous prime is 28939863553. The next prime is 28939863581. The reversal of 28939863573 is 37536893982.

28939863573 is a `hidden beast` number, since 28 + 9 + 39 + 8 + 6 + 3 + 573 = 666.

It is not a de Polignac number, because 28939863573 - 2²⁰ = 28938814997 is a prime.

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 28939863573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28939863553) 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 63 ways as a sum of consecutive naturals, for example, 12619815 + ... + 12622107.

It is an arithmetic number, because the mean of its divisors is an integer number (696917200).

Almost surely, 2^28939863573 is an apocalyptic number.

It is an amenable number.

28939863573 is a deficient number, since it is larger than the sum of its proper divisors (15662837227).

28939863573 is a wasteful number, since it uses less digits than its factorization.

28939863573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539 (or 2533 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 28939863573 in words is "twenty-eight billion, nine hundred thirty-nine million, eight hundred sixty-three thousand, five hundred seventy-three".