28817011 has 4 divisors (see below), whose sum is σ = 29746624. Its totient is φ = 27887400.

The previous prime is 28817003. The next prime is 28817069. The reversal of 28817011 is 11071882.

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 28817011 - 2³ = 28817003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28817081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464760 + ... + 464821.

It is an arithmetic number, because the mean of its divisors is an integer number (7436656).

Almost surely, 2^28817011 is an apocalyptic number.

28817011 is a deficient number, since it is larger than the sum of its proper divisors (929613).

28817011 is an equidigital number, since it uses as much as digits as its factorization.

28817011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929612.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 28817011 is about 5368.1478183821. The cubic root of 28817011 is about 306.5841114947.

Adding to 28817011 its reverse (11071882), we get a palindrome (39888893).

The spelling of 28817011 in words is "twenty-eight million, eight hundred seventeen thousand, eleven".