12181384 has 32 divisors (see below), whose sum is σ = 24757920. Its totient is φ = 5596416.

The previous prime is 12181381. The next prime is 12181391. The reversal of 12181384 is 48318121.

It is a super-2 number, since 2×12181384² = 296772232310912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4807 + ... + 6889.

It is an arithmetic number, because the mean of its divisors is an integer number (773685).

Almost surely, 2^12181384 is an apocalyptic number.

It is an amenable number.

12181384 is an abundant number, since it is smaller than the sum of its proper divisors (12576536).

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

12181384 is a wasteful number, since it uses less digits than its factorization.

12181384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149 (or 2145 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 12181384 is about 3490.1839493070. The cubic root of 12181384 is about 230.0906007271.

The spelling of 12181384 in words is "twelve million, one hundred eighty-one thousand, three hundred eighty-four".