22728223 has 4 divisors (see below), whose sum is σ = 25975120. Its totient is φ = 19481328.

The previous prime is 22728217. The next prime is 22728241. The reversal of 22728223 is 32282722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22728223 - 2⁹ = 22727711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22728191 and 22728200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22728253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623438 + ... + 1623451.

It is an arithmetic number, because the mean of its divisors is an integer number (6493780).

Almost surely, 2^22728223 is an apocalyptic number.

22728223 is a deficient number, since it is larger than the sum of its proper divisors (3246897).

22728223 is an equidigital number, since it uses as much as digits as its factorization.

22728223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246896.

The product of its digits is 5376, while the sum is 28.

The square root of 22728223 is about 4767.4126106306. The cubic root of 22728223 is about 283.2621152798.

The spelling of 22728223 in words is "twenty-two million, seven hundred twenty-eight thousand, two hundred twenty-three".