12323840 has 88 divisors (see below), whose sum is σ = 30950640. Its totient is φ = 4702208.

The previous prime is 12323813. The next prime is 12323851. The reversal of 12323840 is 4832321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148439 + ... + 148521.

Almost surely, 2^12323840 is an apocalyptic number.

12323840 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 12323840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15475320).

12323840 is an abundant number, since it is smaller than the sum of its proper divisors (18626800).

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

12323840 is an equidigital number, since it uses as much as digits as its factorization.

12323840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 12323840 is about 3510.5327231063. The cubic root of 12323840 is about 230.9840634171.

The spelling of 12323840 in words is "twelve million, three hundred twenty-three thousand, eight hundred forty".