406228 has 12 divisors (see below), whose sum is σ = 728532. Its totient is φ = 198080.

The previous prime is 406207. The next prime is 406247. The reversal of 406228 is 822604.

It can be written as a sum of positive squares in 2 ways, for example, as 94864 + 311364 = 308^2 + 558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 406199 and 406208.

It is a congruent number.

It is an unprimeable number.

406228 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 3 ways as a sum of consecutive naturals, for example, 1075 + ... + 1402.

It is an arithmetic number, because the mean of its divisors is an integer number (60711).

2⁴⁰⁶²²⁸ is an apocalyptic number.

It is an amenable number.

406228 is a deficient number, since it is larger than the sum of its proper divisors (322304).

406228 is a wasteful number, since it uses less digits than its factorization.

406228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522 (or 2520 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 406228 is about 637.3601807455. The cubic root of 406228 is about 74.0610647647.

The spelling of 406228 in words is "four hundred six thousand, two hundred twenty-eight".