28708806443085 has 48 divisors (see below), whose sum is σ = 51478699886640. Its totient is φ = 14783144140800.

The previous prime is 28708806443069. The next prime is 28708806443089. The reversal of 28708806443085 is 58034460880782.

28708806443085 is a `hidden beast` number, since 287 + 0 + 8 + 8 + 0 + 6 + 44 + 308 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 7127634476169 + 21581171966916 = 2669763^2 + 4645554^2 .

It is not a de Polignac number, because 28708806443085 - 2⁴ = 28708806443069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28708806443089) 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 47 ways as a sum of consecutive naturals, for example, 102173007 + ... + 102453603.

It is an arithmetic number, because the mean of its divisors is an integer number (1072472914305).

Almost surely, 2^{28708806443085} is an apocalyptic number.

It is an amenable number.

28708806443085 is a deficient number, since it is larger than the sum of its proper divisors (22769893443555).

28708806443085 is a wasteful number, since it uses less digits than its factorization.

28708806443085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359038 (or 359035 counting only the distinct ones).

The product of its (nonzero) digits is 82575360, while the sum is 63.

The spelling of 28708806443085 in words is "twenty-eight trillion, seven hundred eight billion, eight hundred six million, four hundred forty-three thousand, eighty-five".