13921984 has 42 divisors (see below), whose sum is σ = 29354780. Its totient is φ = 6532992.

The previous prime is 13921979. The next prime is 13922017. The reversal of 13921984 is 48912931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130059 + ... + 130165.

Almost surely, 2^13921984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13921984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14677390).

13921984 is an abundant number, since it is smaller than the sum of its proper divisors (15432796).

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

13921984 is an equidigital number, since it uses as much as digits as its factorization.

13921984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 128 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 13921984 is about 3731.2174956708. The cubic root of 13921984 is about 240.5657025752.

The spelling of 13921984 in words is "thirteen million, nine hundred twenty-one thousand, nine hundred eighty-four".