12183840 has 72 divisors (see below), whose sum is σ = 41582268. Its totient is φ = 3248640.

The previous prime is 12183797. The next prime is 12183877. The reversal of 12183840 is 4838121.

It can be written as a sum of positive squares in 2 ways, for example, as 12027024 + 156816 = 3468^2 + 396^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2791 + ... + 5670.

Almost surely, 2^12183840 is an apocalyptic number.

12183840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12183840 is an abundant number, since it is smaller than the sum of its proper divisors (29398428).

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

12183840 is a wasteful number, since it uses less digits than its factorization.

12183840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8482 (or 8471 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 12183840 is about 3490.5357754935. The cubic root of 12183840 is about 230.1060632433.

The spelling of 12183840 in words is "twelve million, one hundred eighty-three thousand, eight hundred forty".