28334013 has 4 divisors (see below), whose sum is σ = 37778688. Its totient is φ = 18889340.

The previous prime is 28334011. The next prime is 28334017. The reversal of 28334013 is 31043382.

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 not a de Polignac number, because 28334013 - 2¹ = 28334011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28334011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4722333 + ... + 4722338.

It is an arithmetic number, because the mean of its divisors is an integer number (9444672).

Almost surely, 2^28334013 is an apocalyptic number.

It is an amenable number.

28334013 is a deficient number, since it is larger than the sum of its proper divisors (9444675).

28334013 is an equidigital number, since it uses as much as digits as its factorization.

28334013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444674.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 28334013 is about 5322.9703174074. The cubic root of 28334013 is about 304.8615801171.

Adding to 28334013 its reverse (31043382), we get a palindrome (59377395).

The spelling of 28334013 in words is "twenty-eight million, three hundred thirty-four thousand, thirteen".