13244140 has 96 divisors (see below), whose sum is σ = 36126720. Its totient is φ = 3960576.

The previous prime is 13244123. The next prime is 13244141. The reversal of 13244140 is 4144231.

13244140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (13244141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34389 + ... + 34771.

It is an arithmetic number, because the mean of its divisors is an integer number (376320).

Almost surely, 2^13244140 is an apocalyptic number.

13244140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13244140 is the 1820-th decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13244140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18063360).

13244140 is an abundant number, since it is smaller than the sum of its proper divisors (22882580).

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

13244140 is a wasteful number, since it uses less digits than its factorization.

13244140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 13244140 is about 3639.2499227176. The cubic root of 13244140 is about 236.5962849190.

Adding to 13244140 its reverse (4144231), we get a palindrome (17388371).

Subtracting from 13244140 its reverse (4144231), we obtain a palindrome (9099909).

The spelling of 13244140 in words is "thirteen million, two hundred forty-four thousand, one hundred forty".