13939744 has 48 divisors (see below), whose sum is σ = 33784128. Its totient is φ = 5513472.

The previous prime is 13939741. The next prime is 13939747. The reversal of 13939744 is 44793931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13939741) and next prime (13939747).

It is a junction number, because it is equal to n+sod(n) for n = 13939697 and 13939706.

It is not an unprimeable number, because it can be changed into a prime (13939741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519 + ... + 5305.

It is an arithmetic number, because the mean of its divisors is an integer number (703836).

Almost surely, 2^13939744 is an apocalyptic number.

13939744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13939744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16892064).

13939744 is an abundant number, since it is smaller than the sum of its proper divisors (19844384).

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

13939744 is a wasteful number, since it uses less digits than its factorization.

13939744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4817 (or 4809 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 13939744 is about 3733.5966573801. The cubic root of 13939744 is about 240.6679540791.

The spelling of 13939744 in words is "thirteen million, nine hundred thirty-nine thousand, seven hundred forty-four".