28918355085 has 24 divisors (see below), whose sum is σ = 50131205280. Its totient is φ = 15421259232.

The previous prime is 28918355083. The next prime is 28918355093. The reversal of 28918355085 is 58055381982.

It is a happy number.

28918355085 is a `hidden beast` number, since 2 + 8 + 9 + 1 + 8 + 3 + 550 + 85 = 666.

It is not a de Polignac number, because 28918355085 - 2¹ = 28918355083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28918355083) 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 23 ways as a sum of consecutive naturals, for example, 389742 + ... + 457968.

It is an arithmetic number, because the mean of its divisors is an integer number (2088800220).

Almost surely, 2^28918355085 is an apocalyptic number.

It is an amenable number.

28918355085 is a deficient number, since it is larger than the sum of its proper divisors (21212850195).

28918355085 is a wasteful number, since it uses less digits than its factorization.

28918355085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77657 (or 77654 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 54.

The spelling of 28918355085 in words is "twenty-eight billion, nine hundred eighteen million, three hundred fifty-five thousand, eighty-five".