28644222419 has 2 divisors, whose sum is σ = 28644222420. Its totient is φ = 28644222418.

The previous prime is 28644222413. The next prime is 28644222443. The reversal of 28644222419 is 91422244682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28644222419 - 2¹⁶ = 28644156883 is a prime.

It is a super-2 number, since 2×28644222419² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28644222419.

It is not a weakly prime, because it can be changed into another prime (28644222413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322111209 + 14322111210.

It is an arithmetic number, because the mean of its divisors is an integer number (14322111210).

Almost surely, 2^28644222419 is an apocalyptic number.

28644222419 is a deficient number, since it is larger than the sum of its proper divisors (1).

28644222419 is an equidigital number, since it uses as much as digits as its factorization.

28644222419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 44.

The spelling of 28644222419 in words is "twenty-eight billion, six hundred forty-four million, two hundred twenty-two thousand, four hundred nineteen".