13887855 has 40 divisors (see below), whose sum is σ = 25404192. Its totient is φ = 7255872.

The previous prime is 13887823. The next prime is 13887857. The reversal of 13887855 is 55878831.

It is a happy number.

It is not a de Polignac number, because 13887855 - 2⁵ = 13887823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 13887855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887857) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21142 + ... + 21788.

Almost surely, 2^13887855 is an apocalyptic number.

13887855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13887855 is a deficient number, since it is larger than the sum of its proper divisors (11516337).

13887855 is an equidigital number, since it uses as much as digits as its factorization.

13887855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 708 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 13887855 is about 3726.6412491679. The cubic root of 13887855 is about 240.3689637333.

The spelling of 13887855 in words is "thirteen million, eight hundred eighty-seven thousand, eight hundred fifty-five".