220004 has 6 divisors (see below), whose sum is σ = 385014. Its totient is φ = 110000.

The previous prime is 219983. The next prime is 220009. The reversal of 220004 is 400022.

220004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 123904 + 96100 = 352^2 + 310^2 .

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 219973 and 220000.

It is not an unprimeable number, because it can be changed into a prime (220009) by changing a digit.

220004 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 as a sum of consecutive naturals, namely, 27497 + ... + 27504.

It is an arithmetic number, because the mean of its divisors is an integer number (64169).

2²²⁰⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

220004 is a deficient number, since it is larger than the sum of its proper divisors (165010).

220004 is a wasteful number, since it uses less digits than its factorization.

220004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55005 (or 55003 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 220004 is about 469.0458399773. The cubic root of 220004 is about 60.3684732331.

Adding to 220004 its reverse (400022), we get a palindrome (620026).

The spelling of 220004 in words is "two hundred twenty thousand, four", and thus it is an iban number.