28216822357 has 2 divisors, whose sum is σ = 28216822358. Its totient is φ = 28216822356.

The previous prime is 28216822327. The next prime is 28216822367. The reversal of 28216822357 is 75322861282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26753836356 + 1462986001 = 163566^2 + 38249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28216822357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28216822327) 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 as a sum of consecutive naturals, namely, 14108411178 + 14108411179.

It is an arithmetic number, because the mean of its divisors is an integer number (14108411179).

Almost surely, 2^28216822357 is an apocalyptic number.

It is an amenable number.

28216822357 is a deficient number, since it is larger than the sum of its proper divisors (1).

28216822357 is an equidigital number, since it uses as much as digits as its factorization.

28216822357 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 28216822357 in words is "twenty-eight billion, two hundred sixteen million, eight hundred twenty-two thousand, three hundred fifty-seven".