28142724439 has 2 divisors, whose sum is σ = 28142724440. Its totient is φ = 28142724438.

The previous prime is 28142724431. The next prime is 28142724457. The reversal of 28142724439 is 93442724182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28142724439 - 2³ = 28142724431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28142724431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14071362219 + 14071362220.

It is an arithmetic number, because the mean of its divisors is an integer number (14071362220).

Almost surely, 2^28142724439 is an apocalyptic number.

28142724439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28142724439 is an equidigital number, since it uses as much as digits as its factorization.

28142724439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 46.

The spelling of 28142724439 in words is "twenty-eight billion, one hundred forty-two million, seven hundred twenty-four thousand, four hundred thirty-nine".