28844183209 has 2 divisors, whose sum is σ = 28844183210. Its totient is φ = 28844183208.

The previous prime is 28844183167. The next prime is 28844183279. The reversal of 28844183209 is 90238144882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17130883225 + 11713299984 = 130885^2 + 108228^2 .

It is a cyclic number.

It is not a de Polignac number, because 28844183209 - 2¹¹ = 28844181161 is a prime.

It is not a weakly prime, because it can be changed into another prime (28844183279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14422091604 + 14422091605.

It is an arithmetic number, because the mean of its divisors is an integer number (14422091605).

Almost surely, 2^28844183209 is an apocalyptic number.

It is an amenable number.

28844183209 is a deficient number, since it is larger than the sum of its proper divisors (1).

28844183209 is an equidigital number, since it uses as much as digits as its factorization.

28844183209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 28844183209 in words is "twenty-eight billion, eight hundred forty-four million, one hundred eighty-three thousand, two hundred nine".