28566909839 has 8 divisors (see below), whose sum is σ = 30769399920. Its totient is φ = 26365139136.

The previous prime is 28566909829. The next prime is 28566909869. The reversal of 28566909839 is 93890966582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28566909839 - 2³² = 24271942543 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 (28566909829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95909 + ... + 257550.

It is an arithmetic number, because the mean of its divisors is an integer number (3846174990).

Almost surely, 2^28566909839 is an apocalyptic number.

28566909839 is a deficient number, since it is larger than the sum of its proper divisors (2202490081).

28566909839 is a wasteful number, since it uses less digits than its factorization.

28566909839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359689.

The product of its (nonzero) digits is 50388480, while the sum is 65.

The spelling of 28566909839 in words is "twenty-eight billion, five hundred sixty-six million, nine hundred nine thousand, eight hundred thirty-nine".