13821396 has 24 divisors (see below), whose sum is σ = 32368224. Its totient is φ = 4590240.

The previous prime is 13821383. The next prime is 13821407. The reversal of 13821396 is 69312831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1551 + ... + 5481.

It is an arithmetic number, because the mean of its divisors is an integer number (1348676).

Almost surely, 2^13821396 is an apocalyptic number.

It is an amenable number.

13821396 is an abundant number, since it is smaller than the sum of its proper divisors (18546828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13821396 is a wasteful number, since it uses less digits than its factorization.

13821396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4231 (or 4229 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 13821396 is about 3717.7138136226. The cubic root of 13821396 is about 239.9849296093.

The spelling of 13821396 in words is "thirteen million, eight hundred twenty-one thousand, three hundred ninety-six".