28849844393 has 2 divisors, whose sum is σ = 28849844394. Its totient is φ = 28849844392.

The previous prime is 28849844347. The next prime is 28849844423. The reversal of 28849844393 is 39344894882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15225585664 + 13624258729 = 123392^2 + 116723^2 .

It is a cyclic number.

It is not a de Polignac number, because 28849844393 - 2¹² = 28849840297 is a prime.

It is not a weakly prime, because it can be changed into another prime (28849834393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14424922196 + 14424922197.

It is an arithmetic number, because the mean of its divisors is an integer number (14424922197).

Almost surely, 2^28849844393 is an apocalyptic number.

It is an amenable number.

28849844393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28849844393 is an equidigital number, since it uses as much as digits as its factorization.

28849844393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47775744, while the sum is 62.

The spelling of 28849844393 in words is "twenty-eight billion, eight hundred forty-nine million, eight hundred forty-four thousand, three hundred ninety-three".