28248653 has 4 divisors (see below), whose sum is σ = 28259868. Its totient is φ = 28237440.

The previous prime is 28248643. The next prime is 28248683. The reversal of 28248653 is 35684282.

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 can be written as a sum of positive squares in 2 ways, for example, as 15382084 + 12866569 = 3922^2 + 3587^2 .

It is a cyclic number.

It is not a de Polignac number, because 28248653 - 2⁴ = 28248637 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 (28248643) 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, 125 + ... + 7517.

It is an arithmetic number, because the mean of its divisors is an integer number (7064967).

Almost surely, 2^28248653 is an apocalyptic number.

It is an amenable number.

28248653 is a deficient number, since it is larger than the sum of its proper divisors (11215).

28248653 is an equidigital number, since it uses as much as digits as its factorization.

28248653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11214.

The product of its digits is 92160, while the sum is 38.

The square root of 28248653 is about 5314.9461897558. The cubic root of 28248653 is about 304.5551267522. Note that the first 3 decimals are identical.

The spelling of 28248653 in words is "twenty-eight million, two hundred forty-eight thousand, six hundred fifty-three".