28643415893 has 8 divisors (see below), whose sum is σ = 29351383776. Its totient is φ = 27937350000.

The previous prime is 28643415881. The next prime is 28643415901. The reversal of 28643415893 is 39851434682.

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-28643415893 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 (28643415793) 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, 444983 + ... + 505268.

It is an arithmetic number, because the mean of its divisors is an integer number (3668922972).

Almost surely, 2^28643415893 is an apocalyptic number.

It is an amenable number.

28643415893 is a deficient number, since it is larger than the sum of its proper divisors (707967883).

28643415893 is an equidigital number, since it uses as much as digits as its factorization.

28643415893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950995.

The product of its digits is 4976640, while the sum is 53.

The spelling of 28643415893 in words is "twenty-eight billion, six hundred forty-three million, four hundred fifteen thousand, eight hundred ninety-three".