28346199989 has 2 divisors, whose sum is σ = 28346199990. Its totient is φ = 28346199988.

The previous prime is 28346199977. The next prime is 28346200007. The reversal of 28346199989 is 98999164382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25149202225 + 3196997764 = 158585^2 + 56542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28346199989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28346199289) 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, 14173099994 + 14173099995.

It is an arithmetic number, because the mean of its divisors is an integer number (14173099995).

Almost surely, 2^28346199989 is an apocalyptic number.

It is an amenable number.

28346199989 is a deficient number, since it is larger than the sum of its proper divisors (1).

28346199989 is an equidigital number, since it uses as much as digits as its factorization.

28346199989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60466176, while the sum is 68.

The spelling of 28346199989 in words is "twenty-eight billion, three hundred forty-six million, one hundred ninety-nine thousand, nine hundred eighty-nine".