28017313 has 4 divisors (see below), whose sum is σ = 28032048. Its totient is φ = 28002580.

The previous prime is 28017307. The next prime is 28017331. The reversal of 28017313 is 31371082.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28017313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28017413) 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, 4003 + ... + 8488.

It is an arithmetic number, because the mean of its divisors is an integer number (7008012).

Almost surely, 2^28017313 is an apocalyptic number.

It is an amenable number.

28017313 is a deficient number, since it is larger than the sum of its proper divisors (14735).

28017313 is a wasteful number, since it uses less digits than its factorization.

28017313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14734.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 28017313 is about 5293.1382940558. The cubic root of 28017313 is about 303.7214705602.

Adding to 28017313 its reverse (31371082), we get a palindrome (59388395).

The spelling of 28017313 in words is "twenty-eight million, seventeen thousand, three hundred thirteen".