28563361 has 2 divisors, whose sum is σ = 28563362. Its totient is φ = 28563360.

The previous prime is 28563331. The next prime is 28563377. The reversal of 28563361 is 16336582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17172736 + 11390625 = 4144^2 + 3375^2 .

It is a cyclic number.

It is not a de Polignac number, because 28563361 - 2¹⁷ = 28432289 is a prime.

It is not a weakly prime, because it can be changed into another prime (28563331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14281680 + 14281681.

It is an arithmetic number, because the mean of its divisors is an integer number (14281681).

Almost surely, 2^28563361 is an apocalyptic number.

It is an amenable number.

28563361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28563361 is an equidigital number, since it uses as much as digits as its factorization.

28563361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 28563361 is about 5344.4701327634. The cubic root of 28563361 is about 305.6819320228.

The spelling of 28563361 in words is "twenty-eight million, five hundred sixty-three thousand, three hundred sixty-one".