13878545 has 32 divisors (see below), whose sum is σ = 19077120. Its totient is φ = 9630720.

The previous prime is 13878523. The next prime is 13878563. The reversal of 13878545 is 54587831.

It is not a de Polignac number, because 13878545 - 2⁶ = 13878481 is a prime.

It is a super-2 number, since 2×13878545² = 385228022634050, which contains 22 as substring.

It is a Curzon 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 in 31 ways as a sum of consecutive naturals, for example, 60491 + ... + 60719.

It is an arithmetic number, because the mean of its divisors is an integer number (596160).

Almost surely, 2^13878545 is an apocalyptic number.

It is an amenable number.

13878545 is a deficient number, since it is larger than the sum of its proper divisors (5198575).

13878545 is a wasteful number, since it uses less digits than its factorization.

13878545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305.

The product of its digits is 134400, while the sum is 41.

The square root of 13878545 is about 3725.3919256905. The cubic root of 13878545 is about 240.3152396870.

The spelling of 13878545 in words is "thirteen million, eight hundred seventy-eight thousand, five hundred forty-five".