13931984 has 20 divisors (see below), whose sum is σ = 29447520. Its totient is φ = 6332640.

The previous prime is 13931933. The next prime is 13931987. The reversal of 13931984 is 48913931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13931987) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39404 + ... + 39755.

It is an arithmetic number, because the mean of its divisors is an integer number (1472376).

Almost surely, 2^13931984 is an apocalyptic number.

It is an amenable number.

13931984 is an abundant number, since it is smaller than the sum of its proper divisors (15515536).

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

13931984 is a wasteful number, since it uses less digits than its factorization.

13931984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79178 (or 79172 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 13931984 is about 3732.5573002969. The cubic root of 13931984 is about 240.6232873100.

It can be divided in two parts, 139 and 31984, that added together give a palindrome (32123).

The spelling of 13931984 in words is "thirteen million, nine hundred thirty-one thousand, nine hundred eighty-four".