13444240 has 40 divisors (see below), whose sum is σ = 31480128. Its totient is φ = 5339520.

The previous prime is 13444237. The next prime is 13444243. The reversal of 13444240 is 4244431.

It is an interprime number because it is at equal distance from previous prime (13444237) and next prime (13444243).

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (13444243) 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, 12525 + ... + 13555.

Almost surely, 2^13444240 is an apocalyptic number.

13444240 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 13444240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15740064).

13444240 is an abundant number, since it is smaller than the sum of its proper divisors (18035888).

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

13444240 is a wasteful number, since it uses less digits than its factorization.

13444240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207 (or 1201 counting only the distinct ones).

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

The square root of 13444240 is about 3666.6387877728. The cubic root of 13444240 is about 237.7818776932.

Adding to 13444240 its reverse (4244431), we get a palindrome (17688671).

The spelling of 13444240 in words is "thirteen million, four hundred forty-four thousand, two hundred forty".