13118644 has 48 divisors (see below), whose sum is σ = 28901376. Its totient is φ = 5061600.

The previous prime is 13118641. The next prime is 13118653. The reversal of 13118644 is 44681131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13118641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58717 + ... + 58939.

It is an arithmetic number, because the mean of its divisors is an integer number (602112).

Almost surely, 2^13118644 is an apocalyptic number.

13118644 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 13118644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14450688).

13118644 is an abundant number, since it is smaller than the sum of its proper divisors (15782732).

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

13118644 is a wasteful number, since it uses less digits than its factorization.

13118644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 434 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 13118644 is about 3621.9668689815. The cubic root of 13118644 is about 235.8466158354.

Adding to 13118644 its reverse (44681131), we get a palindrome (57799775).

The spelling of 13118644 in words is "thirteen million, one hundred eighteen thousand, six hundred forty-four".