12309900 has 72 divisors (see below), whose sum is σ = 36612240. Its totient is φ = 3191040.

The previous prime is 12309893. The next prime is 12309907. The reversal of 12309900 is 990321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12309893) and next prime (12309907).

It is not an unprimeable number, because it can be changed into a prime (12309907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10546 + ... + 11654.

Almost surely, 2^12309900 is an apocalyptic number.

12309900 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 12309900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18306120).

12309900 is an abundant number, since it is smaller than the sum of its proper divisors (24302340).

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

12309900 is a wasteful number, since it uses less digits than its factorization.

12309900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 12309900 is about 3508.5467076840. The cubic root of 12309900 is about 230.8969387150.

The spelling of 12309900 in words is "twelve million, three hundred nine thousand, nine hundred".