28819769999 has 4 divisors (see below), whose sum is σ = 28820132136. Its totient is φ = 28819407864.

The previous prime is 28819769983. The next prime is 28819770029. The reversal of 28819769999 is 99996791882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28819769999 - 2⁴ = 28819769983 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 (28819769939) 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, 3929 + ... + 240114.

It is an arithmetic number, because the mean of its divisors is an integer number (7205033034).

Almost surely, 2^28819769999 is an apocalyptic number.

28819769999 is a deficient number, since it is larger than the sum of its proper divisors (362137).

28819769999 is a wasteful number, since it uses less digits than its factorization.

28819769999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362136.

The product of its digits is 317447424, while the sum is 77.

The spelling of 28819769999 in words is "twenty-eight billion, eight hundred nineteen million, seven hundred sixty-nine thousand, nine hundred ninety-nine".