12809320 has 32 divisors (see below), whose sum is σ = 28926720. Its totient is φ = 5104960.

The previous prime is 12809317. The next prime is 12809327. The reversal of 12809320 is 2390821.

It is not an unprimeable number, because it can be changed into a prime (12809327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16869 + ... + 17611.

It is an arithmetic number, because the mean of its divisors is an integer number (903960).

Almost surely, 2^12809320 is an apocalyptic number.

12809320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12809320 is an abundant number, since it is smaller than the sum of its proper divisors (16117400).

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

12809320 is a wasteful number, since it uses less digits than its factorization.

12809320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 12809320 is about 3579.0110365854. The cubic root of 12809320 is about 233.9781799607.

The spelling of 12809320 in words is "twelve million, eight hundred nine thousand, three hundred twenty".