28248263 has 4 divisors (see below), whose sum is σ = 28258968. Its totient is φ = 28237560.

The previous prime is 28248257. The next prime is 28248277. The reversal of 28248263 is 36284282.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28248263 - 2⁴ = 28248247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28248863) 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, 1733 + ... + 7713.

It is an arithmetic number, because the mean of its divisors is an integer number (7064742).

Almost surely, 2^28248263 is an apocalyptic number.

28248263 is a deficient number, since it is larger than the sum of its proper divisors (10705).

28248263 is an equidigital number, since it uses as much as digits as its factorization.

28248263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10704.

The product of its digits is 36864, while the sum is 35.

The square root of 28248263 is about 5314.9095006406. The cubic root of 28248263 is about 304.5537251863.

The spelling of 28248263 in words is "twenty-eight million, two hundred forty-eight thousand, two hundred sixty-three".