28287574265 has 4 divisors (see below), whose sum is σ = 33945089124. Its totient is φ = 22630059408.

The previous prime is 28287574261. The next prime is 28287574277. The reversal of 28287574265 is 56247578282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18226080016 + 10061494249 = 135004^2 + 100307^2 .

It is a cyclic number.

It is not a de Polignac number, because 28287574265 - 2² = 28287574261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28287574265.

It is not an unprimeable number, because it can be changed into a prime (28287574261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828757422 + ... + 2828757431.

It is an arithmetic number, because the mean of its divisors is an integer number (8486272281).

Almost surely, 2^28287574265 is an apocalyptic number.

It is an amenable number.

28287574265 is a deficient number, since it is larger than the sum of its proper divisors (5657514859).

28287574265 is an equidigital number, since it uses as much as digits as its factorization.

28287574265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5657514858.

The product of its digits is 15052800, while the sum is 56.

The spelling of 28287574265 in words is "twenty-eight billion, two hundred eighty-seven million, five hundred seventy-four thousand, two hundred sixty-five".