28113013 has 8 divisors (see below), whose sum is σ = 29117088. Its totient is φ = 27124944.

The previous prime is 28113011. The next prime is 28113037. The reversal of 28113013 is 31031182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28113013 - 2¹ = 28113011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28113011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370 + ... + 7507.

It is an arithmetic number, because the mean of its divisors is an integer number (3639636).

Almost surely, 2^28113013 is an apocalyptic number.

It is an amenable number.

28113013 is a deficient number, since it is larger than the sum of its proper divisors (1004075).

28113013 is an equidigital number, since it uses as much as digits as its factorization.

28113013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8003.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 28113013 is about 5302.1705932571. The cubic root of 28113013 is about 304.0668892805.

Adding to 28113013 its reverse (31031182), we get a palindrome (59144195).

The spelling of 28113013 in words is "twenty-eight million, one hundred thirteen thousand, thirteen".