28058549 has 2 divisors, whose sum is σ = 28058550. Its totient is φ = 28058548.

The previous prime is 28058521. The next prime is 28058557. The reversal of 28058549 is 94585082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27636049 + 422500 = 5257^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 28058549 - 2⁸ = 28058293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28058519) 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, 14029274 + 14029275.

It is an arithmetic number, because the mean of its divisors is an integer number (14029275).

Almost surely, 2^28058549 is an apocalyptic number.

It is an amenable number.

28058549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28058549 is an equidigital number, since it uses as much as digits as its factorization.

28058549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 28058549 is about 5297.0320935407. The cubic root of 28058549 is about 303.8704036998.

The spelling of 28058549 in words is "twenty-eight million, fifty-eight thousand, five hundred forty-nine".