28809231959 has 8 divisors (see below), whose sum is σ = 28982436672. Its totient is φ = 28636519680.

The previous prime is 28809231947. The next prime is 28809231961. The reversal of 28809231959 is 95913290882.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28809231959 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 (28809236959) 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, 5414 + ... + 240099.

It is an arithmetic number, because the mean of its divisors is an integer number (3622804584).

Almost surely, 2^28809231959 is an apocalyptic number.

28809231959 is a deficient number, since it is larger than the sum of its proper divisors (173204713).

28809231959 is a wasteful number, since it uses less digits than its factorization.

28809231959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246217.

The product of its (nonzero) digits is 2799360, while the sum is 56.

It can be divided in two parts, 2880923 and 1959, that added together give a palindrome (2882882).

The spelling of 28809231959 in words is "twenty-eight billion, eight hundred nine million, two hundred thirty-one thousand, nine hundred fifty-nine".