11991892 has 24 divisors (see below), whose sum is σ = 22982400. Its totient is φ = 5429760.

The previous prime is 11991839. The next prime is 11991911. The reversal of 11991892 is 29819911.

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, 19453 + ... + 20059.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^11991892 is an apocalyptic number.

It is an amenable number.

11991892 is a deficient number, since it is larger than the sum of its proper divisors (10990508).

11991892 is a wasteful number, since it uses less digits than its factorization.

11991892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071 (or 1069 counting only the distinct ones).

The product of its digits is 11664, while the sum is 40.

The square root of 11991892 is about 3462.9311283940. The cubic root of 11991892 is about 228.8912738761.

The spelling of 11991892 in words is "eleven million, nine hundred ninety-one thousand, eight hundred ninety-two".