28545073 has 2 divisors, whose sum is σ = 28545074. Its totient is φ = 28545072.

The previous prime is 28545071. The next prime is 28545089. The reversal of 28545073 is 37054582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28483569 + 61504 = 5337^2 + 248^2 .

It is a cyclic number.

It is not a de Polignac number, because 28545073 - 2¹ = 28545071 is a prime.

Together with 28545071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28545071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14272536 + 14272537.

It is an arithmetic number, because the mean of its divisors is an integer number (14272537).

Almost surely, 2^28545073 is an apocalyptic number.

It is an amenable number.

28545073 is a deficient number, since it is larger than the sum of its proper divisors (1).

28545073 is an equidigital number, since it uses as much as digits as its factorization.

28545073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 28545073 is about 5342.7589314885. The cubic root of 28545073 is about 305.6166793764.

The spelling of 28545073 in words is "twenty-eight million, five hundred forty-five thousand, seventy-three".