13143844 has 24 divisors (see below), whose sum is σ = 27195840. Its totient is φ = 5438496.

The previous prime is 13143827. The next prime is 13143847. The reversal of 13143844 is 44834131.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (13143847) 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, 7282 + ... + 8905.

It is an arithmetic number, because the mean of its divisors is an integer number (1133160).

Almost surely, 2^13143844 is an apocalyptic number.

13143844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13143844 is an abundant number, since it is smaller than the sum of its proper divisors (14051996).

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

13143844 is a wasteful number, since it uses less digits than its factorization.

13143844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16227 (or 16225 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 13143844 is about 3625.4439728122. The cubic root of 13143844 is about 235.9975342077.

Adding to 13143844 its reverse (44834131), we get a palindrome (57977975).

The spelling of 13143844 in words is "thirteen million, one hundred forty-three thousand, eight hundred forty-four".