408220 has 12 divisors (see below), whose sum is σ = 857304. Its totient is φ = 163280.

The previous prime is 408217. The next prime is 408223. The reversal of 408220 is 22804.

It is an interprime number because it is at equal distance from previous prime (408217) and next prime (408223).

It is a junction number, because it is equal to n+sod(n) for n = 408194 and 408203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408223) 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, 10186 + ... + 10225.

It is an arithmetic number, because the mean of its divisors is an integer number (71442).

2⁴⁰⁸²²⁰ is an apocalyptic number.

It is an amenable number.

408220 is an abundant number, since it is smaller than the sum of its proper divisors (449084).

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

408220 is a wasteful number, since it uses less digits than its factorization.

408220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20420 (or 20418 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 408220 is about 638.9209653783. The cubic root of 408220 is about 74.1819239466.

The spelling of 408220 in words is "four hundred eight thousand, two hundred twenty".