28028593 has 2 divisors, whose sum is σ = 28028594. Its totient is φ = 28028592.

The previous prime is 28028549. The next prime is 28028641. The reversal of 28028593 is 39582082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25522704 + 2505889 = 5052^2 + 1583^2 .

It is a cyclic number.

It is not a de Polignac number, because 28028593 - 2⁹ = 28028081 is a prime.

It is not a weakly prime, because it can be changed into another prime (28028893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14014296 + 14014297.

It is an arithmetic number, because the mean of its divisors is an integer number (14014297).

Almost surely, 2^28028593 is an apocalyptic number.

It is an amenable number.

28028593 is a deficient number, since it is larger than the sum of its proper divisors (1).

28028593 is an equidigital number, since it uses as much as digits as its factorization.

28028593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 28028593 is about 5294.2037172742. The cubic root of 28028593 is about 303.7622253430.

The spelling of 28028593 in words is "twenty-eight million, twenty-eight thousand, five hundred ninety-three".