406218 has 16 divisors (see below), whose sum is σ = 823680. Its totient is φ = 133536.

The previous prime is 406207. The next prime is 406247. The reversal of 406218 is 812604.

It is a junction number, because it is equal to n+sod(n) for n = 406194 and 406203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 902.

It is an arithmetic number, because the mean of its divisors is an integer number (51480).

2⁴⁰⁶²¹⁸ is an apocalyptic number.

406218 is an abundant number, since it is smaller than the sum of its proper divisors (417462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406218 is a wasteful number, since it uses less digits than its factorization.

406218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 406218 is about 637.3523358394. The cubic root of 406218 is about 74.0604570463.

The spelling of 406218 in words is "four hundred six thousand, two hundred eighteen".