28336476865 has 4 divisors (see below), whose sum is σ = 34003772244. Its totient is φ = 22669181488.

The previous prime is 28336476863. The next prime is 28336476893. The reversal of 28336476865 is 56867463382.

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 4477349569 + 23859127296 = 66913^2 + 154464^2 .

It is a cyclic number.

It is not a de Polignac number, because 28336476865 - 2¹ = 28336476863 is a prime.

It is a super-2 number, since 2×28336476865² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28336476863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833647682 + ... + 2833647691.

It is an arithmetic number, because the mean of its divisors is an integer number (8500943061).

Almost surely, 2^28336476865 is an apocalyptic number.

It is an amenable number.

28336476865 is a deficient number, since it is larger than the sum of its proper divisors (5667295379).

28336476865 is an equidigital number, since it uses as much as digits as its factorization.

28336476865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5667295378.

The product of its digits is 34836480, while the sum is 58.

The spelling of 28336476865 in words is "twenty-eight billion, three hundred thirty-six million, four hundred seventy-six thousand, eight hundred sixty-five".