28549553 has 2 divisors, whose sum is σ = 28549554. Its totient is φ = 28549552.

The previous prime is 28549537. The next prime is 28549561. The reversal of 28549553 is 35594582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17447329 + 11102224 = 4177^2 + 3332^2 .

It is a cyclic number.

It is not a de Polignac number, because 28549553 - 2⁴ = 28549537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28549553.

It is not a weakly prime, because it can be changed into another prime (28549513) 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, 14274776 + 14274777.

It is an arithmetic number, because the mean of its divisors is an integer number (14274777).

Almost surely, 2^28549553 is an apocalyptic number.

It is an amenable number.

28549553 is a deficient number, since it is larger than the sum of its proper divisors (1).

28549553 is an equidigital number, since it uses as much as digits as its factorization.

28549553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 41.

The square root of 28549553 is about 5343.1781740833. The cubic root of 28549553 is about 305.6326668535.

The spelling of 28549553 in words is "twenty-eight million, five hundred forty-nine thousand, five hundred fifty-three".