28713421579 has 4 divisors (see below), whose sum is σ = 28730343384. Its totient is φ = 28696499776.

The previous prime is 28713421567. The next prime is 28713421609. The reversal of 28713421579 is 97512431782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28713421579 - 2⁹ = 28713421067 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28713425579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8458357 + ... + 8461750.

It is an arithmetic number, because the mean of its divisors is an integer number (7182585846).

Almost surely, 2^28713421579 is an apocalyptic number.

28713421579 is a deficient number, since it is larger than the sum of its proper divisors (16921805).

28713421579 is a wasteful number, since it uses less digits than its factorization.

28713421579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16921804.

The product of its digits is 846720, while the sum is 49.

The spelling of 28713421579 in words is "twenty-eight billion, seven hundred thirteen million, four hundred twenty-one thousand, five hundred seventy-nine".