13878105 has 16 divisors (see below), whose sum is σ = 22274304. Its totient is φ = 7378560.

The previous prime is 13878101. The next prime is 13878119. The reversal of 13878105 is 50187831.

It is not a de Polignac number, because 13878105 - 2² = 13878101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13878101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4245 + ... + 6765.

It is an arithmetic number, because the mean of its divisors is an integer number (1392144).

Almost surely, 2^13878105 is an apocalyptic number.

13878105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13878105 is a deficient number, since it is larger than the sum of its proper divisors (8396199).

13878105 is a wasteful number, since it uses less digits than its factorization.

13878105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 13878105 is about 3725.3328710331. The cubic root of 13878105 is about 240.3127000398.

The spelling of 13878105 in words is "thirteen million, eight hundred seventy-eight thousand, one hundred five".