28225223 has 8 divisors (see below), whose sum is σ = 30676800. Its totient is φ = 25813728.

The previous prime is 28225217. The next prime is 28225237. The reversal of 28225223 is 32252282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28225223 - 2⁸ = 28224967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28225192 and 28225201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28225723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8543 + ... + 11376.

It is an arithmetic number, because the mean of its divisors is an integer number (3834600).

Almost surely, 2^28225223 is an apocalyptic number.

28225223 is a deficient number, since it is larger than the sum of its proper divisors (2451577).

28225223 is a wasteful number, since it uses less digits than its factorization.

28225223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20041.

The product of its digits is 3840, while the sum is 26.

The square root of 28225223 is about 5312.7415709782. The cubic root of 28225223 is about 304.4709020830.

The spelling of 28225223 in words is "twenty-eight million, two hundred twenty-five thousand, two hundred twenty-three".