28866104809 has 8 divisors (see below), whose sum is σ = 29714287680. Its totient is φ = 28025961936.

The previous prime is 28866104783. The next prime is 28866104831. The reversal of 28866104809 is 90840166882.

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 28866104809 - 2²⁹ = 28329233897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28866104879) 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, 2002714 + ... + 2017075.

It is an arithmetic number, because the mean of its divisors is an integer number (3714285960).

Almost surely, 2^28866104809 is an apocalyptic number.

It is an amenable number.

28866104809 is a deficient number, since it is larger than the sum of its proper divisors (848182871).

28866104809 is a wasteful number, since it uses less digits than its factorization.

28866104809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019999.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 28866104809 in words is "twenty-eight billion, eight hundred sixty-six million, one hundred four thousand, eight hundred nine".