28843207 has 2 divisors, whose sum is σ = 28843208. Its totient is φ = 28843206.

The previous prime is 28843201. The next prime is 28843211. The reversal of 28843207 is 70234882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28843207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28843201) 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, 14421603 + 14421604.

It is an arithmetic number, because the mean of its divisors is an integer number (14421604).

Almost surely, 2^28843207 is an apocalyptic number.

28843207 is a deficient number, since it is larger than the sum of its proper divisors (1).

28843207 is an equidigital number, since it uses as much as digits as its factorization.

28843207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28843207 is about 5370.5872118419. The cubic root of 28843207 is about 306.6769830860.

The spelling of 28843207 in words is "twenty-eight million, eight hundred forty-three thousand, two hundred seven".