28223241917 has 16 divisors (see below), whose sum is σ = 32709750192. Its totient is φ = 24117765120.

The previous prime is 28223241913. The next prime is 28223241967. The reversal of 28223241917 is 71914232282.

It can be written as a sum of positive squares in 8 ways, for example, as 312193561 + 27911048356 = 17669^2 + 167066^2 .

It is a cyclic number.

It is not a de Polignac number, because 28223241917 - 2² = 28223241913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28223241911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033298 + ... + 1060259.

It is an arithmetic number, because the mean of its divisors is an integer number (2044359387).

Almost surely, 2^28223241917 is an apocalyptic number.

It is an amenable number.

28223241917 is a deficient number, since it is larger than the sum of its proper divisors (4486508275).

28223241917 is a wasteful number, since it uses less digits than its factorization.

28223241917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093648.

The product of its digits is 96768, while the sum is 41.

The spelling of 28223241917 in words is "twenty-eight billion, two hundred twenty-three million, two hundred forty-one thousand, nine hundred seventeen".