28527115 has 4 divisors (see below), whose sum is σ = 34232544. Its totient is φ = 22821688.

The previous prime is 28527101. The next prime is 28527131. The reversal of 28527115 is 51172582.

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 28527115 - 2⁷ = 28526987 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2852707 + ... + 2852716.

It is an arithmetic number, because the mean of its divisors is an integer number (8558136).

Almost surely, 2^28527115 is an apocalyptic number.

28527115 is a deficient number, since it is larger than the sum of its proper divisors (5705429).

28527115 is an equidigital number, since it uses as much as digits as its factorization.

28527115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5705428.

The product of its digits is 5600, while the sum is 31.

The square root of 28527115 is about 5341.0780746962. The cubic root of 28527115 is about 305.5525770631.

Adding to 28527115 its reverse (51172582), we get a palindrome (79699697).

The spelling of 28527115 in words is "twenty-eight million, five hundred twenty-seven thousand, one hundred fifteen".