12091992 has 64 divisors (see below), whose sum is σ = 33298560. Its totient is φ = 3628800.

The previous prime is 12091979. The next prime is 12092033. The reversal of 12091992 is 29919021.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42892 + ... + 43172.

It is an arithmetic number, because the mean of its divisors is an integer number (520290).

Almost surely, 2^12091992 is an apocalyptic number.

12091992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12091992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16649280).

12091992 is an abundant number, since it is smaller than the sum of its proper divisors (21206568).

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

12091992 is a wasteful number, since it uses less digits than its factorization.

12091992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 12091992 is about 3477.3541666043. The cubic root of 12091992 is about 229.5263852027.

The spelling of 12091992 in words is "twelve million, ninety-one thousand, nine hundred ninety-two".