28307033 has 2 divisors, whose sum is σ = 28307034. Its totient is φ = 28307032.

The previous prime is 28307011. The next prime is 28307047. The reversal of 28307033 is 33070382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23697424 + 4609609 = 4868^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 28307033 - 2⁶ = 28306969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28306993 and 28307011.

It is not a weakly prime, because it can be changed into another prime (28307003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14153516 + 14153517.

It is an arithmetic number, because the mean of its divisors is an integer number (14153517).

Almost surely, 2^28307033 is an apocalyptic number.

It is an amenable number.

28307033 is a deficient number, since it is larger than the sum of its proper divisors (1).

28307033 is an equidigital number, since it uses as much as digits as its factorization.

28307033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 28307033 is about 5320.4354145126. The cubic root of 28307033 is about 304.7647850566.

The spelling of 28307033 in words is "twenty-eight million, three hundred seven thousand, thirty-three".