13944520 has 32 divisors (see below), whose sum is σ = 31735800. Its totient is φ = 5513728.

The previous prime is 13944517. The next prime is 13944521. The reversal of 13944520 is 2544931.

It can be written as a sum of positive squares in 4 ways, for example, as 11168964 + 2775556 = 3342^2 + 1666^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13944521) 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 7 ways as a sum of consecutive naturals, for example, 1602 + ... + 5518.

Almost surely, 2^13944520 is an apocalyptic number.

13944520 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 13944520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15867900).

13944520 is an abundant number, since it is smaller than the sum of its proper divisors (17791280).

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

13944520 is a wasteful number, since it uses less digits than its factorization.

13944520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017 (or 4013 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 13944520 is about 3734.2362003494. The cubic root of 13944520 is about 240.6954366236.

It can be divided in two parts, 139445 and 20, that multiplied together give a square (2788900 = 1670²).

The spelling of 13944520 in words is "thirteen million, nine hundred forty-four thousand, five hundred twenty".