13087656 has 80 divisors (see below), whose sum is σ = 38623200. Its totient is φ = 4129056.

The previous prime is 13087649. The next prime is 13087687. The reversal of 13087656 is 65678031.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13087656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11781 + ... + 12843.

It is an arithmetic number, because the mean of its divisors is an integer number (482790).

Almost surely, 2^13087656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13087656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19311600).

13087656 is an abundant number, since it is smaller than the sum of its proper divisors (25535544).

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

13087656 is a wasteful number, since it uses less digits than its factorization.

13087656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 13087656 is about 3617.6865535864. The cubic root of 13087656 is about 235.6607689602.

The spelling of 13087656 in words is "thirteen million, eighty-seven thousand, six hundred fifty-six".