13720424 has 16 divisors (see below), whose sum is σ = 25977120. Its totient is φ = 6793200.

The previous prime is 13720417. The next prime is 13720433. The reversal of 13720424 is 42402731.

13720424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×13720424³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13720424.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7502 + ... + 9149.

It is an arithmetic number, because the mean of its divisors is an integer number (1623570).

Almost surely, 2^13720424 is an apocalyptic number.

It is an amenable number.

13720424 is a deficient number, since it is larger than the sum of its proper divisors (12256696).

13720424 is a wasteful number, since it uses less digits than its factorization.

13720424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16760 (or 16756 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 13720424 is about 3704.1090696684. The cubic root of 13720424 is about 239.3990985971.

The spelling of 13720424 in words is "thirteen million, seven hundred twenty thousand, four hundred twenty-four".