28254503 has 4 divisors (see below), whose sum is σ = 28676280. Its totient is φ = 27832728.

The previous prime is 28254467. The next prime is 28254517. The reversal of 28254503 is 30545282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30545282 = 2 ⋅15272641.

It is a cyclic number.

It is not a de Polignac number, because 28254503 - 2¹⁰ = 28253479 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 (28254553) 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, 210788 + ... + 210921.

It is an arithmetic number, because the mean of its divisors is an integer number (7169070).

Almost surely, 2^28254503 is an apocalyptic number.

28254503 is a deficient number, since it is larger than the sum of its proper divisors (421777).

28254503 is an equidigital number, since it uses as much as digits as its factorization.

28254503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421776.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 28254503 is about 5315.4964960952. The cubic root of 28254503 is about 304.5761486929.

Adding to 28254503 its reverse (30545282), we get a palindrome (58799785).

The spelling of 28254503 in words is "twenty-eight million, two hundred fifty-four thousand, five hundred three".