13997724 has 48 divisors (see below), whose sum is σ = 35858592. Its totient is φ = 4223232.

The previous prime is 13997719. The next prime is 13997741. The reversal of 13997724 is 42779931.

Its product of digits (95256) is a multiple of the sum of its prime divisors (1764).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7422 + ... + 9114.

It is an arithmetic number, because the mean of its divisors is an integer number (747054).

Almost surely, 2^13997724 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 13997724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17929296).

13997724 is an abundant number, since it is smaller than the sum of its proper divisors (21860868).

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

13997724 is a wasteful number, since it uses less digits than its factorization.

13997724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1764 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The square root of 13997724 is about 3741.3532311184. The cubic root of 13997724 is about 241.0011650340.

The spelling of 13997724 in words is "thirteen million, nine hundred ninety-seven thousand, seven hundred twenty-four".