28605761279 has 4 divisors (see below), whose sum is σ = 28608660360. Its totient is φ = 28602862200.

The previous prime is 28605761267. The next prime is 28605761311. The reversal of 28605761279 is 97216750682.

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-28605761279 is a prime.

It is a super-2 number, since 2×28605761279² (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 28605761279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28605761209) 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 3 ways as a sum of consecutive naturals, for example, 1434689 + ... + 1454490.

It is an arithmetic number, because the mean of its divisors is an integer number (7152165090).

Almost surely, 2^28605761279 is an apocalyptic number.

28605761279 is a deficient number, since it is larger than the sum of its proper divisors (2899081).

28605761279 is an equidigital number, since it uses as much as digits as its factorization.

28605761279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899080.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 28605761279 in words is "twenty-eight billion, six hundred five million, seven hundred sixty-one thousand, two hundred seventy-nine".