28056227 has 4 divisors (see below), whose sum is σ = 28653216. Its totient is φ = 27459240.

The previous prime is 28056221. The next prime is 28056257. The reversal of 28056227 is 72265082.

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 28056227 - 2¹⁸ = 27794083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28056193 and 28056202.

It is not an unprimeable number, because it can be changed into a prime (28056221) 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, 298424 + ... + 298517.

It is an arithmetic number, because the mean of its divisors is an integer number (7163304).

Almost surely, 2^28056227 is an apocalyptic number.

28056227 is a deficient number, since it is larger than the sum of its proper divisors (596989).

28056227 is an equidigital number, since it uses as much as digits as its factorization.

28056227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596988.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 28056227 is about 5296.8129096656. The cubic root of 28056227 is about 303.8620211501.

The spelling of 28056227 in words is "twenty-eight million, fifty-six thousand, two hundred twenty-seven".