28282493 has 2 divisors, whose sum is σ = 28282494. Its totient is φ = 28282492.

The previous prime is 28282489. The next prime is 28282523. The reversal of 28282493 is 39428282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28281124 + 1369 = 5318^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 28282493 - 2² = 28282489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28282403) 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, 14141246 + 14141247.

It is an arithmetic number, because the mean of its divisors is an integer number (14141247).

Almost surely, 2^28282493 is an apocalyptic number.

It is an amenable number.

28282493 is a deficient number, since it is larger than the sum of its proper divisors (1).

28282493 is an equidigital number, since it uses as much as digits as its factorization.

28282493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 28282493 is about 5318.1287122446. The cubic root of 28282493 is about 304.6766904585.

The spelling of 28282493 in words is "twenty-eight million, two hundred eighty-two thousand, four hundred ninety-three".