12309800 has 48 divisors (see below), whose sum is σ = 29118300. Its totient is φ = 4838400.

The previous prime is 12309797. The next prime is 12309811. The reversal of 12309800 is 890321.

It can be written as a sum of positive squares in 6 ways, for example, as 708964 + 11600836 = 842^2 + 3406^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11696 + ... + 12704.

Almost surely, 2^12309800 is an apocalyptic number.

12309800 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 12309800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14559150).

12309800 is an abundant number, since it is smaller than the sum of its proper divisors (16808500).

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

12309800 is a wasteful number, since it uses less digits than its factorization.

12309800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 12309800 is about 3508.5324567403. The cubic root of 12309800 is about 230.8963134795.

The spelling of 12309800 in words is "twelve million, three hundred nine thousand, eight hundred".