13821448 has 16 divisors (see below), whose sum is σ = 25961580. Its totient is φ = 6898368.

The previous prime is 13821427. The next prime is 13821449. The reversal of 13821448 is 84412831.

It can be written as a sum of positive squares in 2 ways, for example, as 13527684 + 293764 = 3678^2 + 542^2 .

It is not an unprimeable number, because it can be changed into a prime (13821449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4686 + ... + 7042.

Almost surely, 2^13821448 is an apocalyptic number.

It is an amenable number.

13821448 is a deficient number, since it is larger than the sum of its proper divisors (12140132).

13821448 is a wasteful number, since it uses less digits than its factorization.

13821448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096 (or 3092 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 13821448 is about 3717.7208071613. The cubic root of 13821448 is about 239.9852305726.

The spelling of 13821448 in words is "thirteen million, eight hundred twenty-one thousand, four hundred forty-eight".