12091856 has 40 divisors (see below), whose sum is σ = 27051840. Its totient is φ = 5128704.

The previous prime is 12091789. The next prime is 12091861. The reversal of 12091856 is 65819021.

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, 11480 + ... + 12488.

It is an arithmetic number, because the mean of its divisors is an integer number (676296).

Almost surely, 2^12091856 is an apocalyptic number.

12091856 is a gapful number since it is divisible by the number (16) 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 12091856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13525920).

12091856 is an abundant number, since it is smaller than the sum of its proper divisors (14959984).

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

12091856 is a wasteful number, since it uses less digits than its factorization.

12091856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 12091856 is about 3477.3346114517. The cubic root of 12091856 is about 229.5255246964.

The spelling of 12091856 in words is "twelve million, ninety-one thousand, eight hundred fifty-six".