12316840 has 64 divisors (see below), whose sum is σ = 29937600. Its totient is φ = 4543488.

The previous prime is 12316831. The next prime is 12316847. The reversal of 12316840 is 4861321.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12316847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39967 + ... + 40273.

It is an arithmetic number, because the mean of its divisors is an integer number (467775).

Almost surely, 2^12316840 is an apocalyptic number.

12316840 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 12316840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14968800).

12316840 is an abundant number, since it is smaller than the sum of its proper divisors (17620760).

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

12316840 is a wasteful number, since it uses less digits than its factorization.

12316840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 12316840 is about 3509.5355818114. The cubic root of 12316840 is about 230.9403217837.

The spelling of 12316840 in words is "twelve million, three hundred sixteen thousand, eight hundred forty".