11587986 has 48 divisors (see below), whose sum is σ = 27306240. Its totient is φ = 3538080.

The previous prime is 11587951. The next prime is 11588009. The reversal of 11587986 is 68978511.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10056 + ... + 11148.

It is an arithmetic number, because the mean of its divisors is an integer number (568880).

Almost surely, 2^11587986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11587986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13653120).

11587986 is an abundant number, since it is smaller than the sum of its proper divisors (15718254).

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

11587986 is a wasteful number, since it uses less digits than its factorization.

11587986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1148 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 11587986 is about 3404.1131003537. The cubic root of 11587986 is about 226.2920624258.

The spelling of 11587986 in words is "eleven million, five hundred eighty-seven thousand, nine hundred eighty-six".