28047053745 has 12 divisors (see below), whose sum is σ = 48614893236. Its totient is φ = 14958428640.

The previous prime is 28047053743. The next prime is 28047053753. The reversal of 28047053745 is 54735074082.

28047053745 is a `hidden beast` number, since 2 + 8 + 0 + 4 + 70 + 537 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17074910241 + 10972143504 = 130671^2 + 104748^2 .

It is not a de Polignac number, because 28047053745 - 2¹ = 28047053743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 623267861 = 28047053745 / (2 + 8 + 0 + 4 + 7 + 0 + 5 + 3 + 7 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 28047053745.

It is not an unprimeable number, because it can be changed into a prime (28047053743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311633886 + ... + 311633975.

It is an arithmetic number, because the mean of its divisors is an integer number (4051241103).

Almost surely, 2^28047053745 is an apocalyptic number.

It is an amenable number.

28047053745 is a deficient number, since it is larger than the sum of its proper divisors (20567839491).

28047053745 is a wasteful number, since it uses less digits than its factorization.

28047053745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623267872 (or 623267869 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 28047053745 in words is "twenty-eight billion, forty-seven million, fifty-three thousand, seven hundred forty-five".