13535540 has 24 divisors (see below), whose sum is σ = 29087520. Its totient is φ = 5287968.

The previous prime is 13535537. The next prime is 13535549. The reversal of 13535540 is 4553531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13535549) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7010 + ... + 8729.

It is an arithmetic number, because the mean of its divisors is an integer number (1211980).

Almost surely, 2^13535540 is an apocalyptic number.

13535540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13535540 is an abundant number, since it is smaller than the sum of its proper divisors (15551980).

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

13535540 is a wasteful number, since it uses less digits than its factorization.

13535540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15791 (or 15789 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 13535540 is about 3679.0678167166. The cubic root of 13535540 is about 238.3189237163.

Subtracting from 13535540 its reverse (4553531), we obtain a square (8982009 = 2997²).

The spelling of 13535540 in words is "thirteen million, five hundred thirty-five thousand, five hundred forty".