28253253 has 16 divisors (see below), whose sum is σ = 43932800. Its totient is φ = 16144128.

The previous prime is 28253233. The next prime is 28253261. The reversal of 28253253 is 35235282.

It is not a de Polignac number, because 28253253 - 2⁶ = 28253189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28253253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28253233) 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 15 ways as a sum of consecutive naturals, for example, 12700 + ... + 14757.

It is an arithmetic number, because the mean of its divisors is an integer number (2745800).

Almost surely, 2^28253253 is an apocalyptic number.

It is an amenable number.

28253253 is a deficient number, since it is larger than the sum of its proper divisors (15679547).

28253253 is an equidigital number, since it uses as much as digits as its factorization.

28253253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27481 (or 27467 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 28253253 is about 5315.3789140568. The cubic root of 28253253 is about 304.5716570690.

It can be divided in two parts, 282 and 53253, that added together give a palindrome (53535).

The spelling of 28253253 in words is "twenty-eight million, two hundred fifty-three thousand, two hundred fifty-three".