13540720 has 20 divisors (see below), whose sum is σ = 31482360. Its totient is φ = 5416256.

The previous prime is 13540717. The next prime is 13540729. The reversal of 13540720 is 2704531.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 13540691 and 13540700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13540729) 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 3 ways as a sum of consecutive naturals, for example, 84550 + ... + 84709.

It is an arithmetic number, because the mean of its divisors is an integer number (1574118).

Almost surely, 2^13540720 is an apocalyptic number.

13540720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13540720 is an abundant number, since it is smaller than the sum of its proper divisors (17941640).

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

13540720 is a wasteful number, since it uses less digits than its factorization.

13540720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169272 (or 169266 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 13540720 is about 3679.7717320508. The cubic root of 13540720 is about 238.3493210894.

The spelling of 13540720 in words is "thirteen million, five hundred forty thousand, seven hundred twenty".