28268571223 has 4 divisors (see below), whose sum is σ = 28290605688. Its totient is φ = 28246536760.

The previous prime is 28268571217. The next prime is 28268571229. The reversal of 28268571223 is 32217586282.

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

It is an interprime number because it is at equal distance from previous prime (28268571217) and next prime (28268571229).

It is a cyclic number.

It is not a de Polignac number, because 28268571223 - 2¹³ = 28268563031 is a prime.

It is a super-2 number, since 2×28268571223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268571229) 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, 11015308 + ... + 11017873.

It is an arithmetic number, because the mean of its divisors is an integer number (7072651422).

Almost surely, 2^28268571223 is an apocalyptic number.

28268571223 is a deficient number, since it is larger than the sum of its proper divisors (22034465).

28268571223 is a wasteful number, since it uses less digits than its factorization.

28268571223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22034464.

The product of its digits is 645120, while the sum is 46.

The spelling of 28268571223 in words is "twenty-eight billion, two hundred sixty-eight million, five hundred seventy-one thousand, two hundred twenty-three".