12809790 has 48 divisors (see below), whose sum is σ = 38065248. Its totient is φ = 2927808.

The previous prime is 12809761. The next prime is 12809791. The reversal of 12809790 is 9790821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12809791) 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, 9537 + ... + 10796.

It is an arithmetic number, because the mean of its divisors is an integer number (793026).

Almost surely, 2^12809790 is an apocalyptic number.

12809790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12809790 is an abundant number, since it is smaller than the sum of its proper divisors (25255458).

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

12809790 is a wasteful number, since it uses less digits than its factorization.

12809790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20353 (or 20350 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 12809790 is about 3579.0766965797. The cubic root of 12809790 is about 233.9810416374.

The spelling of 12809790 in words is "twelve million, eight hundred nine thousand, seven hundred ninety".