28084013 has 2 divisors, whose sum is σ = 28084014. Its totient is φ = 28084012.

The previous prime is 28083961. The next prime is 28084019. The reversal of 28084013 is 31048082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20912329 + 7171684 = 4573^2 + 2678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28084013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28084019) 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, 14042006 + 14042007.

It is an arithmetic number, because the mean of its divisors is an integer number (14042007).

Almost surely, 2^28084013 is an apocalyptic number.

It is an amenable number.

28084013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28084013 is an equidigital number, since it uses as much as digits as its factorization.

28084013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28084013 is about 5299.4351585806. The cubic root of 28084013 is about 303.9622998320.

The spelling of 28084013 in words is "twenty-eight million, eighty-four thousand, thirteen".