220706 has 8 divisors (see below), whose sum is σ = 333264. Its totient is φ = 109620.

The previous prime is 220699. The next prime is 220709. The reversal of 220706 is 607022.

220706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×220706² = 97422276872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220709) by changing a digit.

220706 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, 161 + ... + 683.

It is an arithmetic number, because the mean of its divisors is an integer number (41658).

2²²⁰⁷⁰⁶ is an apocalyptic number.

220706 is a deficient number, since it is larger than the sum of its proper divisors (112558).

220706 is a wasteful number, since it uses less digits than its factorization.

220706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 220706 is about 469.7935716887. The cubic root of 220706 is about 60.4326139961.

Adding to 220706 its reverse (607022), we get a palindrome (827728).

The spelling of 220706 in words is "two hundred twenty thousand, seven hundred six".