28671117393 has 4 divisors (see below), whose sum is σ = 38228156528. Its totient is φ = 19114078260.

The previous prime is 28671117379. The next prime is 28671117407. The reversal of 28671117393 is 39371117682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (28671117379) and next prime (28671117407).

It is a de Polignac number, because none of the positive numbers 2^k-28671117393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28671117193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4778519563 + ... + 4778519568.

It is an arithmetic number, because the mean of its divisors is an integer number (9557039132).

Almost surely, 2^28671117393 is an apocalyptic number.

It is an amenable number.

28671117393 is a deficient number, since it is larger than the sum of its proper divisors (9557039135).

28671117393 is an equidigital number, since it uses as much as digits as its factorization.

28671117393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9557039134.

The product of its digits is 381024, while the sum is 48.

The spelling of 28671117393 in words is "twenty-eight billion, six hundred seventy-one million, one hundred seventeen thousand, three hundred ninety-three".