13889928891 has 8 divisors (see below), whose sum is σ = 19494637120. Its totient is φ = 8772586632.

The previous prime is 13889928869. The next prime is 13889928893. The reversal of 13889928891 is 19882998831.

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

It is not a de Polignac number, because 13889928891 - 2¹⁴ = 13889912507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13889928893) 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, 121841425 + ... + 121841538.

It is an arithmetic number, because the mean of its divisors is an integer number (2436829640).

Almost surely, 2^13889928891 is an apocalyptic number.

13889928891 is a deficient number, since it is larger than the sum of its proper divisors (5604708229).

13889928891 is a wasteful number, since it uses less digits than its factorization.

13889928891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243682985.

The product of its digits is 17915904, while the sum is 66.

The spelling of 13889928891 in words is "thirteen billion, eight hundred eighty-nine million, nine hundred twenty-eight thousand, eight hundred ninety-one".