27228109 has 4 divisors (see below), whose sum is σ = 27290016. Its totient is φ = 27166204.

The previous prime is 27228107. The next prime is 27228119. The reversal of 27228109 is 90182272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27228109 - 2¹ = 27228107 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27228107) 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, 30289 + ... + 31174.

It is an arithmetic number, because the mean of its divisors is an integer number (6822504).

Almost surely, 2^27228109 is an apocalyptic number.

It is an amenable number.

27228109 is a deficient number, since it is larger than the sum of its proper divisors (61907).

27228109 is an equidigital number, since it uses as much as digits as its factorization.

27228109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61906.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 27228109 is about 5218.0560556590. The cubic root of 27228109 is about 300.8424800248.

The spelling of 27228109 in words is "twenty-seven million, two hundred twenty-eight thousand, one hundred nine".