13404224 has 14 divisors (see below), whose sum is σ = 26599134. Its totient is φ = 6702080.

The previous prime is 13404169. The next prime is 13404233. The reversal of 13404224 is 42240431.

It can be written as a sum of positive squares in only one way, i.e., 10445824 + 2958400 = 3232^2 + 1720^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13404196 and 13404205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104657 + ... + 104784.

Almost surely, 2^13404224 is an apocalyptic number.

It is an amenable number.

13404224 is a deficient number, since it is larger than the sum of its proper divisors (13194910).

13404224 is an equidigital number, since it uses as much as digits as its factorization.

13404224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209453 (or 209443 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 13404224 is about 3661.1779525175. The cubic root of 13404224 is about 237.5457285909.

Adding to 13404224 its reverse (42240431), we get a palindrome (55644655).

The spelling of 13404224 in words is "thirteen million, four hundred four thousand, two hundred twenty-four".