13539860 has 12 divisors (see below), whose sum is σ = 28433748. Its totient is φ = 5415936.

The previous prime is 13539853. The next prime is 13539899. The reversal of 13539860 is 6893531.

It can be written as a sum of positive squares in 2 ways, for example, as 7409284 + 6130576 = 2722^2 + 2476^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13539860.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 338477 + ... + 338516.

It is an arithmetic number, because the mean of its divisors is an integer number (2369479).

Almost surely, 2^13539860 is an apocalyptic number.

13539860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13539860 is an abundant number, since it is smaller than the sum of its proper divisors (14893888).

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

13539860 is a wasteful number, since it uses less digits than its factorization.

13539860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677002 (or 677000 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 13539860 is about 3679.6548751208. The cubic root of 13539860 is about 238.3442749580.

The spelling of 13539860 in words is "thirteen million, five hundred thirty-nine thousand, eight hundred sixty".