13863144 has 32 divisors (see below), whose sum is σ = 34776000. Its totient is φ = 4605312.

The previous prime is 13863139. The next prime is 13863149. The reversal of 13863144 is 44136831.

It is an interprime number because it is at equal distance from previous prime (13863139) and next prime (13863149).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (13863149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7812 + ... + 9420.

It is an arithmetic number, because the mean of its divisors is an integer number (1086750).

Almost surely, 2^13863144 is an apocalyptic number.

It is an amenable number.

13863144 is an abundant number, since it is smaller than the sum of its proper divisors (20912856).

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

13863144 is a wasteful number, since it uses less digits than its factorization.

13863144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977 (or 1973 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 13863144 is about 3723.3243210873. The cubic root of 13863144 is about 240.2263143017.

Adding to 13863144 its reverse (44136831), we get a palindrome (57999975).

The spelling of 13863144 in words is "thirteen million, eight hundred sixty-three thousand, one hundred forty-four".