13404424 has 32 divisors (see below), whose sum is σ = 28864800. Its totient is φ = 5771520.

The previous prime is 13404407. The next prime is 13404427. The reversal of 13404424 is 42440431.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 13404395 and 13404404.

It is not an unprimeable number, because it can be changed into a prime (13404427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2337 + ... + 5680.

It is an arithmetic number, because the mean of its divisors is an integer number (902025).

Almost surely, 2^13404424 is an apocalyptic number.

It is an amenable number.

13404424 is an abundant number, since it is smaller than the sum of its proper divisors (15460376).

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

13404424 is a wasteful number, since it uses less digits than its factorization.

13404424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053 (or 8049 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 13404424 is about 3661.2052660292. The cubic root of 13404424 is about 237.5469100322.

Adding to 13404424 its reverse (42440431), we get a palindrome (55844855).

The spelling of 13404424 in words is "thirteen million, four hundred four thousand, four hundred twenty-four".