11911686 has 12 divisors (see below), whose sum is σ = 23840292. Its totient is φ = 3967744.

The previous prime is 11911681. The next prime is 11911709. The reversal of 11911686 is 68611911.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11911681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7750 + ... + 9158.

It is an arithmetic number, because the mean of its divisors is an integer number (1986691).

Almost surely, 2^11911686 is an apocalyptic number.

11911686 is an abundant number, since it is smaller than the sum of its proper divisors (11928606).

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

11911686 is an frugal number, since it uses more digits than its factorization.

11911686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823 (or 1414 counting only the distinct ones).

The product of its digits is 2592, while the sum is 33.

The square root of 11911686 is about 3451.3310475815. The cubic root of 11911686 is about 228.3798301009.

The spelling of 11911686 in words is "eleven million, nine hundred eleven thousand, six hundred eighty-six".