13404056 has 8 divisors (see below), whose sum is σ = 25132620. Its totient is φ = 6702024.

The previous prime is 13404047. The next prime is 13404067. The reversal of 13404056 is 65040431.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×13404056² = 359337434502272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 837746 + ... + 837761.

Almost surely, 2^13404056 is an apocalyptic number.

It is an amenable number.

13404056 is a deficient number, since it is larger than the sum of its proper divisors (11728564).

13404056 is a wasteful number, since it uses less digits than its factorization.

13404056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675513 (or 1675509 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 13404056 is about 3661.1550090101. The cubic root of 13404056 is about 237.5447361712.

Adding to 13404056 its reverse (65040431), we get a palindrome (78444487).

The spelling of 13404056 in words is "thirteen million, four hundred four thousand, fifty-six".