28230593 has 4 divisors (see below), whose sum is σ = 28993620. Its totient is φ = 27467568.

The previous prime is 28230581. The next prime is 28230607. The reversal of 28230593 is 39503282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 15499969 = 3568^2 + 3937^2 .

It is a cyclic number.

It is not a de Polignac number, because 28230593 - 2⁶ = 28230529 is a prime.

It is a super-2 number, since 2×28230593² = 1593932762263298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28230563) 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 in 3 ways as a sum of consecutive naturals, for example, 381458 + ... + 381531.

It is an arithmetic number, because the mean of its divisors is an integer number (7248405).

Almost surely, 2^28230593 is an apocalyptic number.

It is an amenable number.

28230593 is a deficient number, since it is larger than the sum of its proper divisors (763027).

28230593 is an equidigital number, since it uses as much as digits as its factorization.

28230593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763026.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 28230593 is about 5313.2469357258. The cubic root of 28230593 is about 304.4902099324.

The spelling of 28230593 in words is "twenty-eight million, two hundred thirty thousand, five hundred ninety-three".