11987992 has 32 divisors (see below), whose sum is σ = 23980320. Its totient is φ = 5598720.

The previous prime is 11987981. The next prime is 11988029. The reversal of 11987992 is 29978911.

It is a happy number.

11987992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24373 + ... + 24859.

It is an arithmetic number, because the mean of its divisors is an integer number (749385).

Almost surely, 2^11987992 is an apocalyptic number.

It is an amenable number.

11987992 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

11987992 is a wasteful number, since it uses less digits than its factorization.

11987992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 687 counting only the distinct ones).

The product of its digits is 81648, while the sum is 46.

The square root of 11987992 is about 3462.3679758223. The cubic root of 11987992 is about 228.8664578654.

The spelling of 11987992 in words is "eleven million, nine hundred eighty-seven thousand, nine hundred ninety-two".