28200013 has 2 divisors, whose sum is σ = 28200014. Its totient is φ = 28200012.

The previous prime is 28199947. The next prime is 28200017. The reversal of 28200013 is 31000282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26904969 + 1295044 = 5187^2 + 1138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28200013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28200013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28200017) 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, 14100006 + 14100007.

It is an arithmetic number, because the mean of its divisors is an integer number (14100007).

Almost surely, 2^28200013 is an apocalyptic number.

It is an amenable number.

28200013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28200013 is an equidigital number, since it uses as much as digits as its factorization.

28200013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 28200013 is about 5310.3684429614. The cubic root of 28200013 is about 304.3802267105.

Adding to 28200013 its reverse (31000282), we get a palindrome (59200295).

The spelling of 28200013 in words is "twenty-eight million, two hundred thousand, thirteen".