28227412765 has 8 divisors (see below), whose sum is σ = 35865418680. Its totient is φ = 21253581312.

The previous prime is 28227412667. The next prime is 28227412771. The reversal of 28227412765 is 56721472282.

It can be written as a sum of positive squares in 4 ways, for example, as 7458567769 + 20768844996 = 86363^2 + 144114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28227412765 - 2⁹ = 28227412253 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 166043520 + ... + 166043689.

It is an arithmetic number, because the mean of its divisors is an integer number (4483177335).

Almost surely, 2^28227412765 is an apocalyptic number.

It is an amenable number.

28227412765 is a deficient number, since it is larger than the sum of its proper divisors (7638005915).

28227412765 is a wasteful number, since it uses less digits than its factorization.

28227412765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332087231.

The product of its digits is 752640, while the sum is 46.

The spelling of 28227412765 in words is "twenty-eight billion, two hundred twenty-seven million, four hundred twelve thousand, seven hundred sixty-five".