12809232 has 80 divisors (see below), whose sum is σ = 37200000. Its totient is φ = 4219776.

The previous prime is 12809221. The next prime is 12809281. The reversal of 12809232 is 23290821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12809196 and 12809205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64269 + ... + 64467.

It is an arithmetic number, because the mean of its divisors is an integer number (465000).

Almost surely, 2^12809232 is an apocalyptic number.

12809232 is a gapful number since it is divisible by the number (12) 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 12809232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18600000).

12809232 is an abundant number, since it is smaller than the sum of its proper divisors (24390768).

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

12809232 is a wasteful number, since it uses less digits than its factorization.

12809232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12809232 is about 3578.9987426653. The cubic root of 12809232 is about 233.9776441496.

It can be divided in two parts, 12809 and 232, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 12809232 in words is "twelve million, eight hundred nine thousand, two hundred thirty-two".