11991192 has 16 divisors (see below), whose sum is σ = 29978040. Its totient is φ = 3997056.

The previous prime is 11991167. The next prime is 11991209. The reversal of 11991192 is 29119911.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249793 + ... + 249840.

Almost surely, 2^11991192 is an apocalyptic number.

11991192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11991192 is an abundant number, since it is smaller than the sum of its proper divisors (17986848).

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

11991192 is a wasteful number, since it uses less digits than its factorization.

11991192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499642 (or 499638 counting only the distinct ones).

The product of its digits is 1458, while the sum is 33.

The square root of 11991192 is about 3462.8300564712. The cubic root of 11991192 is about 228.8868201165.

The spelling of 11991192 in words is "eleven million, nine hundred ninety-one thousand, one hundred ninety-two".