28127635785 has 12 divisors (see below), whose sum is σ = 48754568772. Its totient is φ = 15001405728.

The previous prime is 28127635741. The next prime is 28127635793. The reversal of 28127635785 is 58753672182.

28127635785 is a `hidden beast` number, since 2 + 8 + 1 + 2 + 7 + 63 + 578 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10311793209 + 17815842576 = 101547^2 + 133476^2 .

It is not a de Polignac number, because 28127635785 - 2⁹ = 28127635273 is a prime.

It is a super-2 number, since 2×28127635785² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312529242 + ... + 312529331.

It is an arithmetic number, because the mean of its divisors is an integer number (4062880731).

Almost surely, 2^28127635785 is an apocalyptic number.

It is an amenable number.

28127635785 is a deficient number, since it is larger than the sum of its proper divisors (20626932987).

28127635785 is a wasteful number, since it uses less digits than its factorization.

28127635785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625058584 (or 625058581 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 28127635785 in words is "twenty-eight billion, one hundred twenty-seven million, six hundred thirty-five thousand, seven hundred eighty-five".