13821284 has 24 divisors (see below), whose sum is σ = 26342400. Its totient is φ = 6320160.

The previous prime is 13821263. The next prime is 13821293. The reversal of 13821284 is 48212831.

13821284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

13821284 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932 + ... + 5339.

It is an arithmetic number, because the mean of its divisors is an integer number (1097600).

Almost surely, 2^13821284 is an apocalyptic number.

It is an amenable number.

13821284 is a deficient number, since it is larger than the sum of its proper divisors (12521116).

13821284 is a wasteful number, since it uses less digits than its factorization.

13821284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323 (or 6321 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 13821284 is about 3717.6987505714. The cubic root of 13821284 is about 239.9842813780.

The spelling of 13821284 in words is "thirteen million, eight hundred twenty-one thousand, two hundred eighty-four".