12327840 has 144 divisors (see below), whose sum is σ = 48117888. Its totient is φ = 2815488.

The previous prime is 12327829. The next prime is 12327841. The reversal of 12327840 is 4872321.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12327841) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9469 + ... + 10691.

It is an arithmetic number, because the mean of its divisors is an integer number (334152).

Almost surely, 2^12327840 is an apocalyptic number.

12327840 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 12327840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24058944).

12327840 is an abundant number, since it is smaller than the sum of its proper divisors (35790048).

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

12327840 is a wasteful number, since it uses less digits than its factorization.

12327840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 12327840 is about 3511.1023909878. The cubic root of 12327840 is about 231.0090511999.

The spelling of 12327840 in words is "twelve million, three hundred twenty-seven thousand, eight hundred forty".