28527313 has 4 divisors (see below), whose sum is σ = 28547568. Its totient is φ = 28507060.

The previous prime is 28527307. The next prime is 28527319. The reversal of 28527313 is 31372582.

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 an interprime number because it is at equal distance from previous prime (28527307) and next prime (28527319).

It is a cyclic number.

It is not a de Polignac number, because 28527313 - 2⁵ = 28527281 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 not an unprimeable number, because it can be changed into a prime (28527319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7843 + ... + 10888.

It is an arithmetic number, because the mean of its divisors is an integer number (7136892).

Almost surely, 2^28527313 is an apocalyptic number.

It is an amenable number.

28527313 is a deficient number, since it is larger than the sum of its proper divisors (20255).

28527313 is a wasteful number, since it uses less digits than its factorization.

28527313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20254.

The product of its digits is 10080, while the sum is 31.

The square root of 28527313 is about 5341.0966102477. The cubic root of 28527313 is about 305.5532839843.

Adding to 28527313 its reverse (31372582), we get a palindrome (59899895).

The spelling of 28527313 in words is "twenty-eight million, five hundred twenty-seven thousand, three hundred thirteen".