13887718 has 16 divisors (see below), whose sum is σ = 22495536. Its totient is φ = 6392160.

The previous prime is 13887683. The next prime is 13887719. The reversal of 13887718 is 81778831.

It is a happy number.

It is a super-2 number, since 2×13887718² = 385737422495048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887719) 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, 17580 + ... + 18352.

It is an arithmetic number, because the mean of its divisors is an integer number (1405971).

Almost surely, 2^13887718 is an apocalyptic number.

13887718 is a deficient number, since it is larger than the sum of its proper divisors (8607818).

13887718 is a wasteful number, since it uses less digits than its factorization.

13887718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479.

The product of its digits is 75264, while the sum is 43.

The square root of 13887718 is about 3726.6228679597. The cubic root of 13887718 is about 240.3681733388.

The spelling of 13887718 in words is "thirteen million, eight hundred eighty-seven thousand, seven hundred eighteen".