28023261745 has 4 divisors (see below), whose sum is σ = 33627914100. Its totient is φ = 22418609392.

The previous prime is 28023261733. The next prime is 28023261751. The reversal of 28023261745 is 54716232082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54716232082 = 2 ⋅27358116041.

It can be written as a sum of positive squares in 2 ways, for example, as 17272267776 + 10750993969 = 131424^2 + 103687^2 .

It is a cyclic number.

It is not a de Polignac number, because 28023261745 - 2²⁵ = 27989707313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28023261698 and 28023261707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2802326170 + ... + 2802326179.

It is an arithmetic number, because the mean of its divisors is an integer number (8406978525).

Almost surely, 2^28023261745 is an apocalyptic number.

It is an amenable number.

28023261745 is a deficient number, since it is larger than the sum of its proper divisors (5604652355).

28023261745 is an equidigital number, since it uses as much as digits as its factorization.

28023261745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604652354.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 28023261745 in words is "twenty-eight billion, twenty-three million, two hundred sixty-one thousand, seven hundred forty-five".