13808405 has 8 divisors (see below), whose sum is σ = 17844792. Its totient is φ = 10196928.

The previous prime is 13808401. The next prime is 13808449. The reversal of 13808405 is 50480831.

13808405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 682276 + 13126129 = 826^2 + 3623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13808405 - 2² = 13808401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13808401) 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, 106154 + ... + 106283.

It is an arithmetic number, because the mean of its divisors is an integer number (2230599).

Almost surely, 2^13808405 is an apocalyptic number.

It is an amenable number.

13808405 is a deficient number, since it is larger than the sum of its proper divisors (4036387).

13808405 is a wasteful number, since it uses less digits than its factorization.

13808405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212455.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 13808405 is about 3715.9662269725. The cubic root of 13808405 is about 239.9097171992.

The spelling of 13808405 in words is "thirteen million, eight hundred eight thousand, four hundred five".