28244838169 has 2 divisors, whose sum is σ = 28244838170. Its totient is φ = 28244838168.

The previous prime is 28244838157. The next prime is 28244838197. The reversal of 28244838169 is 96183844282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27943468569 + 301369600 = 167163^2 + 17360^2 .

It is a cyclic number.

It is not a de Polignac number, because 28244838169 - 2¹¹ = 28244836121 is a prime.

It is a super-2 number, since 2×28244838169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28244832169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14122419084 + 14122419085.

It is an arithmetic number, because the mean of its divisors is an integer number (14122419085).

Almost surely, 2^28244838169 is an apocalyptic number.

It is an amenable number.

28244838169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28244838169 is an equidigital number, since it uses as much as digits as its factorization.

28244838169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5308416, while the sum is 55.

The spelling of 28244838169 in words is "twenty-eight billion, two hundred forty-four million, eight hundred thirty-eight thousand, one hundred sixty-nine".