28448213 has 2 divisors, whose sum is σ = 28448214. Its totient is φ = 28448212.

The previous prime is 28448201. The next prime is 28448261. The reversal of 28448213 is 31284482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 11785489 = 4082^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 28448213 - 2⁸ = 28447957 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28448213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28448513) 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, 14224106 + 14224107.

It is an arithmetic number, because the mean of its divisors is an integer number (14224107).

Almost surely, 2^28448213 is an apocalyptic number.

It is an amenable number.

28448213 is a deficient number, since it is larger than the sum of its proper divisors (1).

28448213 is an equidigital number, since it uses as much as digits as its factorization.

28448213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 32.

The square root of 28448213 is about 5333.6866237153. The cubic root of 28448213 is about 305.2706117498.

The spelling of 28448213 in words is "twenty-eight million, four hundred forty-eight thousand, two hundred thirteen".