28107843829 has 4 divisors (see below), whose sum is σ = 30269985676. Its totient is φ = 25945701984.

The previous prime is 28107843821. The next prime is 28107843839. The reversal of 28107843829 is 92834870182.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2294601604 + 25813242225 = 47902^2 + 160665^2 .

It is a cyclic number.

It is not a de Polignac number, because 28107843829 - 2³ = 28107843821 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 (28107843821) 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, 1081070904 + ... + 1081070929.

It is an arithmetic number, because the mean of its divisors is an integer number (7567496419).

Almost surely, 2^28107843829 is an apocalyptic number.

It is an amenable number.

28107843829 is a deficient number, since it is larger than the sum of its proper divisors (2162141847).

28107843829 is a wasteful number, since it uses less digits than its factorization.

28107843829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162141846.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 28107843829 in words is "twenty-eight billion, one hundred seven million, eight hundred forty-three thousand, eight hundred twenty-nine".