28785814559 has 8 divisors (see below), whose sum is σ = 28844788608. Its totient is φ = 28726890400.

The previous prime is 28785814543. The next prime is 28785814573. The reversal of 28785814559 is 95541858782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28785814559 - 2⁴ = 28785814543 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 (28785814159) 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 7 ways as a sum of consecutive naturals, for example, 1275794 + ... + 1298160.

It is an arithmetic number, because the mean of its divisors is an integer number (3605598576).

Almost surely, 2^28785814559 is an apocalyptic number.

28785814559 is a deficient number, since it is larger than the sum of its proper divisors (58974049).

28785814559 is a wasteful number, since it uses less digits than its factorization.

28785814559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24945.

The product of its digits is 32256000, while the sum is 62.

The spelling of 28785814559 in words is "twenty-eight billion, seven hundred eighty-five million, eight hundred fourteen thousand, five hundred fifty-nine".