27860013 has 6 divisors (see below), whose sum is σ = 40242254. Its totient is φ = 18573336.

The previous prime is 27860011. The next prime is 27860017. The reversal of 27860013 is 31006872.

It can be written as a sum of positive squares in only one way, i.e., 23011209 + 4848804 = 4797^2 + 2202^2 .

It is not a de Polignac number, because 27860013 - 2¹ = 27860011 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 (27860011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1547770 + ... + 1547787.

Almost surely, 2^27860013 is an apocalyptic number.

It is an amenable number.

27860013 is a deficient number, since it is larger than the sum of its proper divisors (12382241).

27860013 is a wasteful number, since it uses less digits than its factorization.

27860013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095563 (or 3095560 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 27860013 is about 5278.2585196256. The cubic root of 27860013 is about 303.1520003299.

Adding to 27860013 its reverse (31006872), we get a palindrome (58866885).

The spelling of 27860013 in words is "twenty-seven million, eight hundred sixty thousand, thirteen".