28544773 has 2 divisors, whose sum is σ = 28544774. Its totient is φ = 28544772.

The previous prime is 28544749. The next prime is 28544777. The reversal of 28544773 is 37744582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19070689 + 9474084 = 4367^2 + 3078^2 .

It is a cyclic number.

It is not a de Polignac number, because 28544773 - 2²¹ = 26447621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28544777) 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, 14272386 + 14272387.

It is an arithmetic number, because the mean of its divisors is an integer number (14272387).

Almost surely, 2^28544773 is an apocalyptic number.

It is an amenable number.

28544773 is a deficient number, since it is larger than the sum of its proper divisors (1).

28544773 is an equidigital number, since it uses as much as digits as its factorization.

28544773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 40.

The square root of 28544773 is about 5342.7308560323. The cubic root of 28544773 is about 305.6156087267.

The spelling of 28544773 in words is "twenty-eight million, five hundred forty-four thousand, seven hundred seventy-three".