220444 has 12 divisors (see below), whose sum is σ = 440944. Its totient is φ = 94464.

The previous prime is 220421. The next prime is 220447. The reversal of 220444 is 444022.

220444 is an admirable number.

220444 is a modest number, since divided by 444 gives 220 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220447) 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, 3909 + ... + 3964.

2²²⁰⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

220444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

220444 is a wasteful number, since it uses less digits than its factorization.

220444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884 (or 7882 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 220444 is about 469.5146430091. The cubic root of 220444 is about 60.4086913505.

Adding to 220444 its reverse (444022), we get a palindrome (664466).

The spelling of 220444 in words is "two hundred twenty thousand, four hundred forty-four", and thus it is an iban number.