28824193 has 4 divisors (see below), whose sum is σ = 28876500. Its totient is φ = 28771888.

The previous prime is 28824181. The next prime is 28824217. The reversal of 28824193 is 39142882.

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 10445824 + 18378369 = 3232^2 + 4287^2 .

It is a cyclic number.

It is not a de Polignac number, because 28824193 - 2⁹ = 28823681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28824143) 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, 25318 + ... + 26431.

It is an arithmetic number, because the mean of its divisors is an integer number (7219125).

Almost surely, 2^28824193 is an apocalyptic number.

It is an amenable number.

28824193 is a deficient number, since it is larger than the sum of its proper divisors (52307).

28824193 is an equidigital number, since it uses as much as digits as its factorization.

28824193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52306.

The product of its digits is 27648, while the sum is 37.

The square root of 28824193 is about 5368.8167225190. The cubic root of 28824193 is about 306.6095791393.

The spelling of 28824193 in words is "twenty-eight million, eight hundred twenty-four thousand, one hundred ninety-three".