220386 has 16 divisors (see below), whose sum is σ = 460224. Its totient is φ = 70224.

The previous prime is 220373. The next prime is 220391. The reversal of 220386 is 683022.

220386 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

220386 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, 661 + ... + 936.

It is an arithmetic number, because the mean of its divisors is an integer number (28764).

2²²⁰³⁸⁶ is an apocalyptic number.

220386 is an abundant number, since it is smaller than the sum of its proper divisors (239838).

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

220386 is a wasteful number, since it uses less digits than its factorization.

220386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 220386 is about 469.4528730341. The cubic root of 220386 is about 60.4033929354.

It can be divided in two parts, 220 and 386, that added together give a palindrome (606).

The spelling of 220386 in words is "two hundred twenty thousand, three hundred eighty-six".