12908690 has 8 divisors (see below), whose sum is σ = 23235660. Its totient is φ = 5163472.

The previous prime is 12908641. The next prime is 12908699. The reversal of 12908690 is 9680921.

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 1545049 = 3371^2 + 1243^2 .

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

It is a super-2 number, since 2×12908690² = 333268555032200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12908690.

It is not an unprimeable number, because it can be changed into a prime (12908699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645425 + ... + 645444.

Almost surely, 2^12908690 is an apocalyptic number.

12908690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12908690 is a deficient number, since it is larger than the sum of its proper divisors (10326970).

12908690 is a wasteful number, since it uses less digits than its factorization.

12908690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290876.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 12908690 is about 3592.8665435833. The cubic root of 12908690 is about 234.5816610408.

The spelling of 12908690 in words is "twelve million, nine hundred eight thousand, six hundred ninety".