13843720 has 64 divisors (see below), whose sum is σ = 34525440. Its totient is φ = 4953600.

The previous prime is 13843717. The next prime is 13843751. The reversal of 13843720 is 2734831.

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 15 ways as a sum of consecutive naturals, for example, 31905 + ... + 32335.

It is an arithmetic number, because the mean of its divisors is an integer number (539460).

Almost surely, 2^13843720 is an apocalyptic number.

13843720 is a gapful number since it is divisible by the number (10) 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 13843720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17262720).

13843720 is an abundant number, since it is smaller than the sum of its proper divisors (20681720).

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

13843720 is a wasteful number, since it uses less digits than its factorization.

13843720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 13843720 is about 3720.7149850533. The cubic root of 13843720 is about 240.1140661489.

Subtracting from 13843720 its reverse (2734831), we obtain a square (11108889 = 3333²).

The spelling of 13843720 in words is "thirteen million, eight hundred forty-three thousand, seven hundred twenty".