12808690 has 8 divisors (see below), whose sum is σ = 23055660. Its totient is φ = 5123472.

The previous prime is 12808661. The next prime is 12808721. The reversal of 12808690 is 9680821.

It can be written as a sum of positive squares in 2 ways, for example, as 11923209 + 885481 = 3453^2 + 941^2 .

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

It is a super-2 number, since 2×12808690² = 328125079032200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640425 + ... + 640444.

Almost surely, 2^12808690 is an apocalyptic number.

12808690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12808690 is a deficient number, since it is larger than the sum of its proper divisors (10246970).

12808690 is a wasteful number, since it uses less digits than its factorization.

12808690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280876.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 12808690 is about 3578.9230223630. The cubic root of 12808690 is about 233.9743439863.

The spelling of 12808690 in words is "twelve million, eight hundred eight thousand, six hundred ninety".