13687312 has 20 divisors (see below), whose sum is σ = 28079676. Its totient is φ = 6440960.

The previous prime is 13687307. The next prime is 13687319. The reversal of 13687312 is 21378631.

It can be written as a sum of positive squares in 2 ways, for example, as 10137856 + 3549456 = 3184^2 + 1884^2 .

It is not an unprimeable number, because it can be changed into a prime (13687319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24889 + ... + 25432.

Almost surely, 2^13687312 is an apocalyptic number.

It is an amenable number.

13687312 is an abundant number, since it is smaller than the sum of its proper divisors (14392364).

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

13687312 is a wasteful number, since it uses less digits than its factorization.

13687312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50346 (or 50340 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 13687312 is about 3699.6367389245. The cubic root of 13687312 is about 239.2063599387.

The spelling of 13687312 in words is "thirteen million, six hundred eighty-seven thousand, three hundred twelve".