13343640 has 128 divisors (see below), whose sum is σ = 43960320. Its totient is φ = 3225600.

The previous prime is 13343621. The next prime is 13343647. The reversal of 13343640 is 4634331.

13343640 = T₉ + T₁₀ + ... + T₄₃₀.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13343640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13343647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63135 + ... + 63345.

It is an arithmetic number, because the mean of its divisors is an integer number (343440).

Almost surely, 2^13343640 is an apocalyptic number.

13343640 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 13343640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21980160).

13343640 is an abundant number, since it is smaller than the sum of its proper divisors (30616680).

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

13343640 is a wasteful number, since it uses less digits than its factorization.

13343640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 13343640 is about 3652.8947425295. The cubic root of 13343640 is about 237.1873040855.

13343640 divided by its sum of digits (24) gives a triangular number (555985 = T₁₀₅₄).

Adding to 13343640 its reverse (4634331), we get a palindrome (17977971).

The spelling of 13343640 in words is "thirteen million, three hundred forty-three thousand, six hundred forty".