12318400 has 42 divisors (see below), whose sum is σ = 30314900. Its totient is φ = 4926720.

The previous prime is 12318379. The next prime is 12318413. The reversal of 12318400 is 481321.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2250 + ... + 5449.

Almost surely, 2^12318400 is an apocalyptic number.

12318400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12318400 is an abundant number, since it is smaller than the sum of its proper divisors (17996500).

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

12318400 is an equidigital number, since it uses as much as digits as its factorization.

12318400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721 (or 7706 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 12318400 is about 3509.7578264034. The cubic root of 12318400 is about 230.9500713540.

Adding to 12318400 its reverse (481321), we get a palindrome (12799721).

The spelling of 12318400 in words is "twelve million, three hundred eighteen thousand, four hundred".