220188 has 24 divisors (see below), whose sum is σ = 524160. Its totient is φ = 71920.

The previous prime is 220177. The next prime is 220189. The reversal of 220188 is 881022.

220188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220188.

It is not an unprimeable number, because it can be changed into a prime (220189) by changing a digit.

220188 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, 553 + ... + 863.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2²²⁰¹⁸⁸ is an apocalyptic number.

It is an amenable number.

220188 is an abundant number, since it is smaller than the sum of its proper divisors (303972).

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

220188 is a wasteful number, since it uses less digits than its factorization.

220188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 220188 is about 469.2419418594. The cubic root of 220188 is about 60.3852982360.

The spelling of 220188 in words is "two hundred twenty thousand, one hundred eighty-eight".