12809766 has 8 divisors (see below), whose sum is σ = 25619544. Its totient is φ = 4269920.

The previous prime is 12809761. The next prime is 12809791. The reversal of 12809766 is 66790821.

12809766 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

12809766 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12809761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067475 + ... + 1067486.

It is an arithmetic number, because the mean of its divisors is an integer number (3202443).

Almost surely, 2^12809766 is an apocalyptic number.

12809766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12809766 is a wasteful number, since it uses less digits than its factorization.

12809766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134966.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 12809766 is about 3579.0733437581. The cubic root of 12809766 is about 233.9808955109.

The spelling of 12809766 in words is "twelve million, eight hundred nine thousand, seven hundred sixty-six".