12181884 has 96 divisors (see below), whose sum is σ = 34621440. Its totient is φ = 3283200.

The previous prime is 12181867. The next prime is 12181909. The reversal of 12181884 is 48818121.

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 31 ways as a sum of consecutive naturals, for example, 53082 + ... + 53310.

It is an arithmetic number, because the mean of its divisors is an integer number (360640).

Almost surely, 2^12181884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12181884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17310720).

12181884 is an abundant number, since it is smaller than the sum of its proper divisors (22439556).

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

12181884 is a wasteful number, since it uses less digits than its factorization.

12181884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 289 counting only the distinct ones).

The product of its digits is 4096, while the sum is 33.

The square root of 12181884 is about 3490.2555780344. The cubic root of 12181884 is about 230.0937488020.

The spelling of 12181884 in words is "twelve million, one hundred eighty-one thousand, eight hundred eighty-four".