423220 has 24 divisors (see below), whose sum is σ = 1016064. Its totient is φ = 145056.

The previous prime is 423209. The next prime is 423221. The reversal of 423220 is 22324.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 423220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423221) by changing a digit.

423220 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, 1372 + ... + 1651.

It is an arithmetic number, because the mean of its divisors is an integer number (42336).

2⁴²³²²⁰ is an apocalyptic number.

It is an amenable number.

423220 is an abundant number, since it is smaller than the sum of its proper divisors (592844).

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

423220 is a wasteful number, since it uses less digits than its factorization.

423220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039 (or 3037 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 423220 is about 650.5536103966. The cubic root of 423220 is about 75.0796191510.

Adding to 423220 its reverse (22324), we get a palindrome (445544).

The spelling of 423220 in words is "four hundred twenty-three thousand, two hundred twenty", and thus it is an iban number.