28115227 has 8 divisors (see below), whose sum is σ = 33000416. Its totient is φ = 23447232.

The previous prime is 28115221. The next prime is 28115237. The reversal of 28115227 is 72251182.

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 28115227 - 2⁷ = 28115099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28115195 and 28115204.

It is not an unprimeable number, because it can be changed into a prime (28115221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54018 + ... + 54535.

It is an arithmetic number, because the mean of its divisors is an integer number (4125052).

Almost surely, 2^28115227 is an apocalyptic number.

28115227 is a deficient number, since it is larger than the sum of its proper divisors (4885189).

28115227 is a wasteful number, since it uses less digits than its factorization.

28115227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108597.

The product of its digits is 2240, while the sum is 28.

The square root of 28115227 is about 5302.3793715652. The cubic root of 28115227 is about 304.0748711882.

The spelling of 28115227 in words is "twenty-eight million, one hundred fifteen thousand, two hundred twenty-seven".