28182217447 has 2 divisors, whose sum is σ = 28182217448. Its totient is φ = 28182217446.

The previous prime is 28182217421. The next prime is 28182217493. The reversal of 28182217447 is 74471228182.

It is an a-pointer prime, because the next prime (28182217493) can be obtained adding 28182217447 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28182217447 - 2²⁷ = 28047999719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28182217397 and 28182217406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28182217247) 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, 14091108723 + 14091108724.

It is an arithmetic number, because the mean of its divisors is an integer number (14091108724).

Almost surely, 2^28182217447 is an apocalyptic number.

28182217447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28182217447 is an equidigital number, since it uses as much as digits as its factorization.

28182217447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 401408, while the sum is 46.

The spelling of 28182217447 in words is "twenty-eight billion, one hundred eighty-two million, two hundred seventeen thousand, four hundred forty-seven".