28306107831 has 12 divisors (see below), whose sum is σ = 39832419192. Its totient is φ = 17877541104.

The previous prime is 28306107827. The next prime is 28306107847. The reversal of 28306107831 is 13870160382.

It is not a de Polignac number, because 28306107831 - 2² = 28306107827 is a prime.

It is a super-2 number, since 2×28306107831² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28306107831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28306107331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13067296 + ... + 13069461.

It is an arithmetic number, because the mean of its divisors is an integer number (3319368266).

Almost surely, 2^28306107831 is an apocalyptic number.

28306107831 is a deficient number, since it is larger than the sum of its proper divisors (11526311361).

28306107831 is a wasteful number, since it uses less digits than its factorization.

28306107831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26136798 (or 26136779 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 28306107831 in words is "twenty-eight billion, three hundred six million, one hundred seven thousand, eight hundred thirty-one".