220836 has 48 divisors (see below), whose sum is σ = 645120. Its totient is φ = 57120.

The previous prime is 220811. The next prime is 220841. The reversal of 220836 is 638022.

220836 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

220836 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 6.

It is an unprimeable number.

220836 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 15 ways as a sum of consecutive naturals, for example, 805 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (13440).

2²²⁰⁸³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322560).

220836 is an abundant number, since it is smaller than the sum of its proper divisors (424284).

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

220836 is a wasteful number, since it uses less digits than its factorization.

220836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 262 counting only the distinct ones).

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

The square root of 220836 is about 469.9319099614. The cubic root of 220836 is about 60.4444769840. Note that the first 4 decimals are identical.

Adding to 220836 its reverse (638022), we get a palindrome (858858).

The spelling of 220836 in words is "two hundred twenty thousand, eight hundred thirty-six".