11987836 has 12 divisors (see below), whose sum is σ = 23975728. Its totient is φ = 5137632.

The previous prime is 11987783. The next prime is 11987837. The reversal of 11987836 is 63878911.

11987836 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 11987792 and 11987801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11987837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214041 + ... + 214096.

Almost surely, 2^11987836 is an apocalyptic number.

It is an amenable number.

11987836 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11987836 is a wasteful number, since it uses less digits than its factorization.

11987836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428148 (or 428146 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 11987836 is about 3462.3454478142. The cubic root of 11987836 is about 228.8654651131.

The spelling of 11987836 in words is "eleven million, nine hundred eighty-seven thousand, eight hundred thirty-six".