13605140 has 24 divisors (see below), whose sum is σ = 30075360. Its totient is φ = 5155488.

The previous prime is 13605139. The next prime is 13605161. The reversal of 13605140 is 4150631.

13605140 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 (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17522 + ... + 18281.

It is an arithmetic number, because the mean of its divisors is an integer number (1253140).

Almost surely, 2^13605140 is an apocalyptic number.

13605140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13605140 is an abundant number, since it is smaller than the sum of its proper divisors (16470220).

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

13605140 is a wasteful number, since it uses less digits than its factorization.

13605140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35831 (or 35829 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 13605140 is about 3688.5146061796. The cubic root of 13605140 is about 238.7267056940.

Adding to 13605140 its reverse (4150631), we get a palindrome (17755771).

The spelling of 13605140 in words is "thirteen million, six hundred five thousand, one hundred forty".