28549529 has 2 divisors, whose sum is σ = 28549530. Its totient is φ = 28549528.

The previous prime is 28549523. The next prime is 28549531. The reversal of 28549529 is 92594582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28249225 + 300304 = 5315^2 + 548^2 .

It is a cyclic number.

It is not a de Polignac number, because 28549529 - 2⁴ = 28549513 is a prime.

It is a super-2 number, since 2×28549529² = 1630151212243682, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 28549531, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28549529.

It is not a weakly prime, because it can be changed into another prime (28549523) 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, 14274764 + 14274765.

It is an arithmetic number, because the mean of its divisors is an integer number (14274765).

Almost surely, 2^28549529 is an apocalyptic number.

It is an amenable number.

28549529 is a deficient number, since it is larger than the sum of its proper divisors (1).

28549529 is an equidigital number, since it uses as much as digits as its factorization.

28549529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 44.

The square root of 28549529 is about 5343.1759282285. The cubic root of 28549529 is about 305.6325812108.

The spelling of 28549529 in words is "twenty-eight million, five hundred forty-nine thousand, five hundred twenty-nine".