28439227 has 8 divisors (see below), whose sum is σ = 29708640. Its totient is φ = 27189120.

The previous prime is 28439221. The next prime is 28439231. The reversal of 28439227 is 72293482.

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 28439227 - 2¹¹ = 28437179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28439221) 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, 1774 + ... + 7747.

It is an arithmetic number, because the mean of its divisors is an integer number (3713580).

Almost surely, 2^28439227 is an apocalyptic number.

28439227 is a deficient number, since it is larger than the sum of its proper divisors (1269413).

28439227 is a wasteful number, since it uses less digits than its factorization.

28439227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9653.

The product of its digits is 48384, while the sum is 37.

The square root of 28439227 is about 5332.8441754846. The cubic root of 28439227 is about 305.2384661970.

The spelling of 28439227 in words is "twenty-eight million, four hundred thirty-nine thousand, two hundred twenty-seven".