12908218 has 4 divisors (see below), whose sum is σ = 19362330. Its totient is φ = 6454108.

The previous prime is 12908209. The next prime is 12908251. The reversal of 12908218 is 81280921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11992369 + 915849 = 3463^2 + 957^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 12908218.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227053 + ... + 3227056.

Almost surely, 2^12908218 is an apocalyptic number.

12908218 is a deficient number, since it is larger than the sum of its proper divisors (6454112).

12908218 is an equidigital number, since it uses as much as digits as its factorization.

12908218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454111.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 12908218 is about 3592.8008572700. The cubic root of 12908218 is about 234.5788018843.

The spelling of 12908218 in words is "twelve million, nine hundred eight thousand, two hundred eighteen".