12780218 has 8 divisors (see below), whose sum is σ = 20913120. Its totient is φ = 5809180.

The previous prime is 12780211. The next prime is 12780221. The reversal of 12780218 is 81208721.

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

It is not an unprimeable number, because it can be changed into a prime (12780211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290438 + ... + 290481.

It is an arithmetic number, because the mean of its divisors is an integer number (2614140).

Almost surely, 2^12780218 is an apocalyptic number.

12780218 is a deficient number, since it is larger than the sum of its proper divisors (8132902).

12780218 is a wasteful number, since it uses less digits than its factorization.

12780218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580932.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 12780218 is about 3574.9430764699. The cubic root of 12780218 is about 233.8008508432.

Adding to 12780218 its reverse (81208721), we get a palindrome (93988939).

The spelling of 12780218 in words is "twelve million, seven hundred eighty thousand, two hundred eighteen".