28298187679 has 4 divisors (see below), whose sum is σ = 28314747720. Its totient is φ = 28281627640.

The previous prime is 28298187637. The next prime is 28298187713. The reversal of 28298187679 is 97678189282.

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 28298187679 - 2¹⁹ = 28297663391 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 (28298187629) 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, 8277457 + ... + 8280874.

It is an arithmetic number, because the mean of its divisors is an integer number (7078686930).

Almost surely, 2^28298187679 is an apocalyptic number.

28298187679 is a deficient number, since it is larger than the sum of its proper divisors (16560041).

28298187679 is a wasteful number, since it uses less digits than its factorization.

28298187679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16560040.

The product of its digits is 48771072, while the sum is 67.

The spelling of 28298187679 in words is "twenty-eight billion, two hundred ninety-eight million, one hundred eighty-seven thousand, six hundred seventy-nine".