28204193 has 2 divisors, whose sum is σ = 28204194. Its totient is φ = 28204192.

The previous prime is 28204171. The next prime is 28204201. The reversal of 28204193 is 39140282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16418704 + 11785489 = 4052^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 28204193 - 2⁸ = 28203937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28204123) 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, 14102096 + 14102097.

It is an arithmetic number, because the mean of its divisors is an integer number (14102097).

Almost surely, 2^28204193 is an apocalyptic number.

It is an amenable number.

28204193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28204193 is an equidigital number, since it uses as much as digits as its factorization.

28204193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 28204193 is about 5310.7619980564. The cubic root of 28204193 is about 304.3952650782.

The spelling of 28204193 in words is "twenty-eight million, two hundred four thousand, one hundred ninety-three".