306028013 has 4 divisors (see below), whose sum is σ = 309466620. Its totient is φ = 302589408.

The previous prime is 306027961. The next prime is 306028049. The reversal of 306028013 is 310820603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310820603 = 191 ⋅1627333.

It can be written as a sum of positive squares in 2 ways, for example, as 27071209 + 278956804 = 5203^2 + 16702^2 .

It is a cyclic number.

It is not a de Polignac number, because 306028013 - 2¹² = 306023917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 306028013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306058013) 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, 1719170 + ... + 1719347.

It is an arithmetic number, because the mean of its divisors is an integer number (77366655).

Almost surely, 2^306028013 is an apocalyptic number.

It is an amenable number.

306028013 is a deficient number, since it is larger than the sum of its proper divisors (3438607).

306028013 is an equidigital number, since it uses as much as digits as its factorization.

306028013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438606.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 306028013 is about 17493.6563645225. The cubic root of 306028013 is about 673.8869726554.

Adding to 306028013 its reverse (310820603), we get a palindrome (616848616).

The spelling of 306028013 in words is "three hundred six million, twenty-eight thousand, thirteen".