28847219 has 2 divisors, whose sum is σ = 28847220. Its totient is φ = 28847218.

The previous prime is 28847213. The next prime is 28847243. The reversal of 28847219 is 91274882.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28847219 is a prime.

It is a super-2 number, since 2×28847219² = 1664324088067922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28847213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14423609 + 14423610.

It is an arithmetic number, because the mean of its divisors is an integer number (14423610).

Almost surely, 2^28847219 is an apocalyptic number.

28847219 is a deficient number, since it is larger than the sum of its proper divisors (1).

28847219 is an equidigital number, since it uses as much as digits as its factorization.

28847219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 28847219 is about 5370.9607148070. The cubic root of 28847219 is about 306.6912016970.

The spelling of 28847219 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred nineteen".