28985905198767 has 24 divisors (see below), whose sum is σ = 42489204110640. Its totient is φ = 17563707040000.

The previous prime is 28985905198739. The next prime is 28985905198793. The reversal of 28985905198767 is 76789150958982.

It is not a de Polignac number, because 28985905198767 - 2¹¹ = 28985905196719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28985905198767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28985905198967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6152484 + ... + 9789017.

It is an arithmetic number, because the mean of its divisors is an integer number (1770383504610).

Almost surely, 2^{28985905198767} is an apocalyptic number.

28985905198767 is a deficient number, since it is larger than the sum of its proper divisors (13503298911873).

28985905198767 is a wasteful number, since it uses less digits than its factorization.

28985905198767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15946535 (or 15946524 counting only the distinct ones).

The product of its (nonzero) digits is 5486745600, while the sum is 84.

The spelling of 28985905198767 in words is "twenty-eight trillion, nine hundred eighty-five billion, nine hundred five million, one hundred ninety-eight thousand, seven hundred sixty-seven".