408218 has 8 divisors (see below), whose sum is σ = 615060. Its totient is φ = 203200.

The previous prime is 408217. The next prime is 408223. The reversal of 408218 is 812804.

It can be written as a sum of positive squares in 2 ways, for example, as 310249 + 97969 = 557^2 + 313^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 408193 and 408202.

It is not an unprimeable number, because it can be changed into a prime (408211) 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, 548 + ... + 1056.

2⁴⁰⁸²¹⁸ is an apocalyptic number.

408218 is a deficient number, since it is larger than the sum of its proper divisors (206842).

408218 is a wasteful number, since it uses less digits than its factorization.

408218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 408218 is about 638.9194002376. The cubic root of 408218 is about 74.1818027995.

It can be divided in two parts, 408 and 218, that added together give a palindrome (626).

The spelling of 408218 in words is "four hundred eight thousand, two hundred eighteen".