28345787815 has 8 divisors (see below), whose sum is σ = 34015856688. Its totient is φ = 22676022720.

The previous prime is 28345787807. The next prime is 28345787851. The reversal of 28345787815 is 51878754382.

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

It is not a de Polignac number, because 28345787815 - 2³ = 28345787807 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 28345787815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287284 + ... + 373126.

It is an arithmetic number, because the mean of its divisors is an integer number (4251982086).

Almost surely, 2^28345787815 is an apocalyptic number.

28345787815 is a deficient number, since it is larger than the sum of its proper divisors (5670068873).

28345787815 is an equidigital number, since it uses as much as digits as its factorization.

28345787815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151889.

The product of its digits is 15052800, while the sum is 58.

The spelling of 28345787815 in words is "twenty-eight billion, three hundred forty-five million, seven hundred eighty-seven thousand, eight hundred fifteen".