13871144 has 32 divisors (see below), whose sum is σ = 30175680. Its totient is φ = 5854464.

The previous prime is 13871141. The next prime is 13871147. The reversal of 13871144 is 44117831.

It is an interprime number because it is at equal distance from previous prime (13871141) and next prime (13871147).

It is not an unprimeable number, because it can be changed into a prime (13871141) 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, 1904 + ... + 5600.

It is an arithmetic number, because the mean of its divisors is an integer number (942990).

Almost surely, 2^13871144 is an apocalyptic number.

13871144 is a gapful number since it is divisible by the number (14) 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 13871144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15087840).

13871144 is an abundant number, since it is smaller than the sum of its proper divisors (16304536).

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

13871144 is a wasteful number, since it uses less digits than its factorization.

13871144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777 (or 3773 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 13871144 is about 3724.3984749218. The cubic root of 13871144 is about 240.2725145229.

Adding to 13871144 its reverse (44117831), we get a palindrome (57988975).

The spelling of 13871144 in words is "thirteen million, eight hundred seventy-one thousand, one hundred forty-four".