28081320193 has 8 divisors (see below), whose sum is σ = 28140003936. Its totient is φ = 28022668800.

The previous prime is 28081320077. The next prime is 28081320203. The reversal of 28081320193 is 39102318082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28081320193 - 2⁹ = 28081319681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28081320593) 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, 2517238 + ... + 2528368.

It is an arithmetic number, because the mean of its divisors is an integer number (3517500492).

Almost surely, 2^28081320193 is an apocalyptic number.

It is an amenable number.

28081320193 is a deficient number, since it is larger than the sum of its proper divisors (58683743).

28081320193 is a wasteful number, since it uses less digits than its factorization.

28081320193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16175.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 28081320193 in words is "twenty-eight billion, eighty-one million, three hundred twenty thousand, one hundred ninety-three".