13087312 has 30 divisors (see below), whose sum is σ = 29498298. Its totient is φ = 5608512.

The previous prime is 13087279. The next prime is 13087313. The reversal of 13087312 is 21378031.

It can be written as a sum of positive squares in only one way, i.e., 8317456 + 4769856 = 2884^2 + 2184^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13087313) 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 5 ways as a sum of consecutive naturals, for example, 7563 + ... + 9130.

Almost surely, 2^13087312 is an apocalyptic number.

It is an amenable number.

13087312 is an abundant number, since it is smaller than the sum of its proper divisors (16410986).

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

13087312 is a wasteful number, since it uses less digits than its factorization.

13087312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16715 (or 16702 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 13087312 is about 3617.6390090776. The cubic root of 13087312 is about 235.6587042153.

The spelling of 13087312 in words is "thirteen million, eighty-seven thousand, three hundred twelve".