12806690 has 64 divisors (see below), whose sum is σ = 26611200. Its totient is φ = 4402944.

The previous prime is 12806683. The next prime is 12806707. The reversal of 12806690 is 9660821.

It is a super-2 number, since 2×12806690² = 328022617512200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162071 + ... + 162149.

It is an arithmetic number, because the mean of its divisors is an integer number (415800).

Almost surely, 2^12806690 is an apocalyptic number.

12806690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12806690 is an abundant number, since it is smaller than the sum of its proper divisors (13804510).

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

12806690 is a wasteful number, since it uses less digits than its factorization.

12806690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 12806690 is about 3578.6435977895. The cubic root of 12806690 is about 233.9621654563.

The spelling of 12806690 in words is "twelve million, eight hundred six thousand, six hundred ninety".