28345813423 has 8 divisors (see below), whose sum is σ = 30565447920. Its totient is φ = 26198953920.

The previous prime is 28345813417. The next prime is 28345813427. The reversal of 28345813423 is 32431854382.

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-28345813423 is a prime.

It is a super-2 number, since 2×28345813423² (a number of 22 digits) contains 22 as substring.

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 28345813423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28345813427) 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, 18192940 + ... + 18194497.

It is an arithmetic number, because the mean of its divisors is an integer number (3820680990).

Almost surely, 2^28345813423 is an apocalyptic number.

28345813423 is a deficient number, since it is larger than the sum of its proper divisors (2219634497).

28345813423 is a wasteful number, since it uses less digits than its factorization.

28345813423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36387497.

The product of its digits is 552960, while the sum is 43.

The spelling of 28345813423 in words is "twenty-eight billion, three hundred forty-five million, eight hundred thirteen thousand, four hundred twenty-three".