406220 has 24 divisors (see below), whose sum is σ = 898800. Its totient is φ = 153792.

The previous prime is 406207. The next prime is 406247. The reversal of 406220 is 22604.

It is a junction number, because it is equal to n+sod(n) for n = 406195 and 406204.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406220.

It is an unprimeable number.

406220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155 + ... + 914.

It is an arithmetic number, because the mean of its divisors is an integer number (37450).

2⁴⁰⁶²²⁰ is an apocalyptic number.

It is an amenable number.

406220 is an abundant number, since it is smaller than the sum of its proper divisors (492580).

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

406220 is a wasteful number, since it uses less digits than its factorization.

406220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 406220 is about 637.3539048284. The cubic root of 406220 is about 74.0605785908.

Adding to 406220 its reverse (22604), we get a palindrome (428824).

It can be divided in two parts, 406 and 220, that added together give a palindrome (626).

The spelling of 406220 in words is "four hundred six thousand, two hundred twenty".