13821398 has 16 divisors (see below), whose sum is σ = 21895920. Its totient is φ = 6525216.

The previous prime is 13821383. The next prime is 13821407. The reversal of 13821398 is 89312831.

It is a congruent number.

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, 20840 + ... + 21492.

It is an arithmetic number, because the mean of its divisors is an integer number (1368495).

Almost surely, 2^13821398 is an apocalyptic number.

13821398 is a deficient number, since it is larger than the sum of its proper divisors (8074522).

13821398 is a wasteful number, since it uses less digits than its factorization.

13821398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231.

The product of its digits is 10368, while the sum is 35.

The square root of 13821398 is about 3717.7140826051. The cubic root of 13821398 is about 239.9849411848.

The spelling of 13821398 in words is "thirteen million, eight hundred twenty-one thousand, three hundred ninety-eight".