13605340 has 36 divisors (see below), whose sum is σ = 33238296. Its totient is φ = 4664352.

The previous prime is 13605331. The next prime is 13605343. The reversal of 13605340 is 4350631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13605343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5962 + ... + 7921.

It is an arithmetic number, because the mean of its divisors is an integer number (923286).

Almost surely, 2^13605340 is an apocalyptic number.

13605340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13605340 is an abundant number, since it is smaller than the sum of its proper divisors (19632956).

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

13605340 is a wasteful number, since it uses less digits than its factorization.

13605340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13906 (or 13897 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 13605340 is about 3688.5417172644. The cubic root of 13605340 is about 238.7278754751.

Adding to 13605340 its reverse (4350631), we get a palindrome (17955971).

The spelling of 13605340 in words is "thirteen million, six hundred five thousand, three hundred forty".