13087812 has 24 divisors (see below), whose sum is σ = 30826656. Its totient is φ = 4321408.

The previous prime is 13087783. The next prime is 13087819. The reversal of 13087812 is 21878031.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13087812.

It is not an unprimeable number, because it can be changed into a prime (13087819) 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, 3813 + ... + 6380.

It is an arithmetic number, because the mean of its divisors is an integer number (1284444).

Almost surely, 2^13087812 is an apocalyptic number.

13087812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13087812 is an abundant number, since it is smaller than the sum of its proper divisors (17738844).

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

13087812 is a wasteful number, since it uses less digits than its factorization.

13087812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10307 (or 10305 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 13087812 is about 3617.7081142624. The cubic root of 13087812 is about 235.6617052861.

The spelling of 13087812 in words is "thirteen million, eighty-seven thousand, eight hundred twelve".