13340240 has 60 divisors (see below), whose sum is σ = 33004956. Its totient is φ = 5013504.

The previous prime is 13340233. The next prime is 13340269. The reversal of 13340240 is 4204331.

It can be written as a sum of positive squares in 6 ways, for example, as 3952144 + 9388096 = 1988^2 + 3064^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 22832 + ... + 23408.

Almost surely, 2^13340240 is an apocalyptic number.

13340240 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 13340240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16502478).

13340240 is an abundant number, since it is smaller than the sum of its proper divisors (19664716).

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

13340240 is a wasteful number, since it uses less digits than its factorization.

13340240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 13340240 is about 3652.4293285429. The cubic root of 13340240 is about 237.1671570258.

Adding to 13340240 its reverse (4204331), we get a palindrome (17544571).

The spelling of 13340240 in words is "thirteen million, three hundred forty thousand, two hundred forty".