28027115 has 4 divisors (see below), whose sum is σ = 33632544. Its totient is φ = 22421688.

The previous prime is 28027063. The next prime is 28027157. The reversal of 28027115 is 51172082.

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 28027115 - 2²⁴ = 11249899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2802707 + ... + 2802716.

It is an arithmetic number, because the mean of its divisors is an integer number (8408136).

Almost surely, 2^28027115 is an apocalyptic number.

28027115 is a deficient number, since it is larger than the sum of its proper divisors (5605429).

28027115 is an equidigital number, since it uses as much as digits as its factorization.

28027115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5605428.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 28027115 is about 5294.0641288145. The cubic root of 28027115 is about 303.7568859329.

Adding to 28027115 its reverse (51172082), we get a palindrome (79199197).

The spelling of 28027115 in words is "twenty-eight million, twenty-seven thousand, one hundred fifteen".