12091860 has 144 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 2822400.

The previous prime is 12091789. The next prime is 12091861. The reversal of 12091860 is 6819021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12091861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61282 + ... + 61478.

It is an arithmetic number, because the mean of its divisors is an integer number (288288).

Almost surely, 2^12091860 is an apocalyptic number.

12091860 is a gapful number since it is divisible by the number (10) 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 12091860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20756736).

12091860 is an abundant number, since it is smaller than the sum of its proper divisors (29421612).

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

12091860 is a wasteful number, since it uses less digits than its factorization.

12091860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 12091860 is about 3477.3351866048. The cubic root of 12091860 is about 229.5255500055.

The spelling of 12091860 in words is "twelve million, ninety-one thousand, eight hundred sixty".