28400341217 has 2 divisors, whose sum is σ = 28400341218. Its totient is φ = 28400341216.

The previous prime is 28400341199. The next prime is 28400341259. The reversal of 28400341217 is 71214300482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19825766416 + 8574574801 = 140804^2 + 92599^2 .

It is a cyclic number.

It is not a de Polignac number, because 28400341217 - 2²² = 28396146913 is a prime.

It is not a weakly prime, because it can be changed into another prime (28400341817) 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, 14200170608 + 14200170609.

It is an arithmetic number, because the mean of its divisors is an integer number (14200170609).

Almost surely, 2^28400341217 is an apocalyptic number.

It is an amenable number.

28400341217 is a deficient number, since it is larger than the sum of its proper divisors (1).

28400341217 is an equidigital number, since it uses as much as digits as its factorization.

28400341217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 28400341217 its reverse (71214300482), we get a palindrome (99614641699).

The spelling of 28400341217 in words is "twenty-eight billion, four hundred million, three hundred forty-one thousand, two hundred seventeen".