28565773 has 2 divisors, whose sum is σ = 28565774. Its totient is φ = 28565772.

The previous prime is 28565767. The next prime is 28565777. The reversal of 28565773 is 37756582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19342404 + 9223369 = 4398^2 + 3037^2 .

It is a cyclic number.

It is not a de Polignac number, because 28565773 - 2⁵ = 28565741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28565777) 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, 14282886 + 14282887.

It is an arithmetic number, because the mean of its divisors is an integer number (14282887).

Almost surely, 2^28565773 is an apocalyptic number.

It is an amenable number.

28565773 is a deficient number, since it is larger than the sum of its proper divisors (1).

28565773 is an equidigital number, since it uses as much as digits as its factorization.

28565773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 43.

The square root of 28565773 is about 5344.6957818009. The cubic root of 28565773 is about 305.6905360997.

The spelling of 28565773 in words is "twenty-eight million, five hundred sixty-five thousand, seven hundred seventy-three".