13405504 has 56 divisors (see below), whose sum is σ = 31747968. Its totient is φ = 5491200.

The previous prime is 13405471. The next prime is 13405519. The reversal of 13405504 is 40550431.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9654 + ... + 10954.

It is an arithmetic number, because the mean of its divisors is an integer number (566928).

Almost surely, 2^13405504 is an apocalyptic number.

13405504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13405504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15873984).

13405504 is an abundant number, since it is smaller than the sum of its proper divisors (18342464).

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

13405504 is a wasteful number, since it uses less digits than its factorization.

13405504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 13405504 is about 3661.3527554717. The cubic root of 13405504 is about 237.5532896118.

Adding to 13405504 its reverse (40550431), we get a palindrome (53955935).

The spelling of 13405504 in words is "thirteen million, four hundred five thousand, five hundred four".