28869715861 has 8 divisors (see below), whose sum is σ = 33234793920. Its totient is φ = 24564846048.

The previous prime is 28869715837. The next prime is 28869715909. The reversal of 28869715861 is 16851796882.

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 28869715861 - 2⁵ = 28869715829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28869715861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28869715801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15051031 + ... + 15052948.

It is an arithmetic number, because the mean of its divisors is an integer number (4154349240).

Almost surely, 2^28869715861 is an apocalyptic number.

It is an amenable number.

28869715861 is a deficient number, since it is larger than the sum of its proper divisors (4365078059).

28869715861 is a wasteful number, since it uses less digits than its factorization.

28869715861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30104123.

The product of its digits is 11612160, while the sum is 61.

The spelling of 28869715861 in words is "twenty-eight billion, eight hundred sixty-nine million, seven hundred fifteen thousand, eight hundred sixty-one".