13887288 has 80 divisors (see below), whose sum is σ = 40293000. Its totient is φ = 4463424.

The previous prime is 13887281. The next prime is 13887299. The reversal of 13887288 is 88278831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887281) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18423 + ... + 19161.

Almost surely, 2^13887288 is an apocalyptic number.

13887288 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13887288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20146500).

13887288 is an abundant number, since it is smaller than the sum of its proper divisors (26405712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13887288 is a wasteful number, since it uses less digits than its factorization.

13887288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 773 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 13887288 is about 3726.5651745273. The cubic root of 13887288 is about 240.3656925045.

The spelling of 13887288 in words is "thirteen million, eight hundred eighty-seven thousand, two hundred eighty-eight".