13887447 has 16 divisors (see below), whose sum is σ = 21454080. Its totient is φ = 7826112.

The previous prime is 13887427. The next prime is 13887449. The reversal of 13887447 is 74478831.

It is not a de Polignac number, because 13887447 - 2⁸ = 13887191 is a prime.

It is a super-2 number, since 2×13887447² = 385722368355618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13887399 and 13887408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2997 + ... + 6062.

It is an arithmetic number, because the mean of its divisors is an integer number (1340880).

Almost surely, 2^13887447 is an apocalyptic number.

13887447 is a deficient number, since it is larger than the sum of its proper divisors (7566633).

13887447 is an equidigital number, since it uses as much as digits as its factorization.

13887447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9142.

The product of its digits is 150528, while the sum is 42.

The square root of 13887447 is about 3726.5865077843. The cubic root of 13887447 is about 240.3666098422.

The spelling of 13887447 in words is "thirteen million, eight hundred eighty-seven thousand, four hundred forty-seven".