13539720 has 32 divisors (see below), whose sum is σ = 40619520. Its totient is φ = 3610560.

The previous prime is 13539719. The next prime is 13539727. The reversal of 13539720 is 2793531.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (13539727) 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, 56296 + ... + 56535.

It is an arithmetic number, because the mean of its divisors is an integer number (1269360).

Almost surely, 2^13539720 is an apocalyptic number.

13539720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13539720 is an abundant number, since it is smaller than the sum of its proper divisors (27079800).

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

13539720 is a wasteful number, since it uses less digits than its factorization.

13539720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112845 (or 112841 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 13539720 is about 3679.6358515484. The cubic root of 13539720 is about 238.3434534746.

The spelling of 13539720 in words is "thirteen million, five hundred thirty-nine thousand, seven hundred twenty".