13947424 has 12 divisors (see below), whose sum is σ = 27459054. Its totient is φ = 6973696.

The previous prime is 13947413. The next prime is 13947431. The reversal of 13947424 is 42474931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13927824 + 19600 = 3732^2 + 140^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13947424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217897 + ... + 217960.

Almost surely, 2^13947424 is an apocalyptic number.

It is an amenable number.

13947424 is a deficient number, since it is larger than the sum of its proper divisors (13511630).

13947424 is an equidigital number, since it uses as much as digits as its factorization.

13947424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435867 (or 435859 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 13947424 is about 3734.6250146434. The cubic root of 13947424 is about 240.7121440478.

The spelling of 13947424 in words is "thirteen million, nine hundred forty-seven thousand, four hundred twenty-four".