28841136539 has 4 divisors (see below), whose sum is σ = 28901348160. Its totient is φ = 28780924920.

The previous prime is 28841136529. The next prime is 28841136563. The reversal of 28841136539 is 93563114882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28841136539 - 2⁴ = 28841136523 is a prime.

It is a super-2 number, since 2×28841136539² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28841136529) 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, 30105092 + ... + 30106049.

It is an arithmetic number, because the mean of its divisors is an integer number (7225337040).

Almost surely, 2^28841136539 is an apocalyptic number.

28841136539 is a deficient number, since it is larger than the sum of its proper divisors (60211621).

28841136539 is an equidigital number, since it uses as much as digits as its factorization.

28841136539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60211620.

The product of its digits is 1244160, while the sum is 50.

The spelling of 28841136539 in words is "twenty-eight billion, eight hundred forty-one million, one hundred thirty-six thousand, five hundred thirty-nine".