13791638 has 12 divisors (see below), whose sum is σ = 24065172. Its totient is φ = 5910660.

The previous prime is 13791637. The next prime is 13791643. The reversal of 13791638 is 83619731.

13791638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13791637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70268 + ... + 70463.

It is an arithmetic number, because the mean of its divisors is an integer number (2005431).

Almost surely, 2^13791638 is an apocalyptic number.

13791638 is a deficient number, since it is larger than the sum of its proper divisors (10273534).

13791638 is a wasteful number, since it uses less digits than its factorization.

13791638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140747 (or 140740 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 13791638 is about 3713.7094662884. The cubic root of 13791638 is about 239.8125735761.

The spelling of 13791638 in words is "thirteen million, seven hundred ninety-one thousand, six hundred thirty-eight".