28803113 has 4 divisors (see below), whose sum is σ = 28814160. Its totient is φ = 28792068.

The previous prime is 28803109. The next prime is 28803133. The reversal of 28803113 is 31130882.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28803113 - 2² = 28803109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28803133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806 + ... + 7632.

It is an arithmetic number, because the mean of its divisors is an integer number (7203540).

Almost surely, 2^28803113 is an apocalyptic number.

It is an amenable number.

28803113 is a deficient number, since it is larger than the sum of its proper divisors (11047).

28803113 is an equidigital number, since it uses as much as digits as its factorization.

28803113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11046.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28803113 is about 5366.8531748130. The cubic root of 28803113 is about 306.5348166394.

Adding to 28803113 its reverse (31130882), we get a palindrome (59933995).

The spelling of 28803113 in words is "twenty-eight million, eight hundred three thousand, one hundred thirteen".