13244440 has 64 divisors (see below), whose sum is σ = 33592320. Its totient is φ = 4656000.

The previous prime is 13244431. The next prime is 13244443. The reversal of 13244440 is 4444231.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13244443) 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, 13155 + ... + 14125.

It is an arithmetic number, because the mean of its divisors is an integer number (524880).

Almost surely, 2^13244440 is an apocalyptic number.

13244440 is a gapful number since it is divisible by the number (10) 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 13244440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16796160).

13244440 is an abundant number, since it is smaller than the sum of its proper divisors (20347880).

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

13244440 is a wasteful number, since it uses less digits than its factorization.

13244440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 13244440 is about 3639.2911397688. The cubic root of 13244440 is about 236.5980713279.

Adding to 13244440 its reverse (4444231), we get a palindrome (17688671).

The spelling of 13244440 in words is "thirteen million, two hundred forty-four thousand, four hundred forty".