28242715679 has 4 divisors (see below), whose sum is σ = 28705711080. Its totient is φ = 27779720280.

The previous prime is 28242715667. The next prime is 28242715687. The reversal of 28242715679 is 97651724282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28242715679 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 28242715679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28242715639) 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, 231497609 + ... + 231497730.

It is an arithmetic number, because the mean of its divisors is an integer number (7176427770).

Almost surely, 2^28242715679 is an apocalyptic number.

28242715679 is a deficient number, since it is larger than the sum of its proper divisors (462995401).

28242715679 is an equidigital number, since it uses as much as digits as its factorization.

28242715679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462995400.

The product of its digits is 3386880, while the sum is 53.

The spelling of 28242715679 in words is "twenty-eight billion, two hundred forty-two million, seven hundred fifteen thousand, six hundred seventy-nine".