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220220 = 225711213
BaseRepresentation
bin110101110000111100
3102012002022
4311300330
524021340
64415312
71605020
oct656074
9365068
10220220
11140500
12a7538
1379310
145a380
15453b5
hex35c3c

220220 has 72 divisors (see below), whose sum is σ = 625632. Its totient is φ = 63360.

The previous prime is 220217. The next prime is 220243. The reversal of 220220 is 22022.

Adding to 220220 its reverse (22022), we get a palindrome (242242).

It can be divided in two parts, 2202 and 20, that added together give a palindrome (2222).

It is a junction number, because it is equal to n+sod(n) for n = 220198 and 220207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16934 + ... + 16946.

2220220 is an apocalyptic number.

220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312816).

220220 is an abundant number, since it is smaller than the sum of its proper divisors (405412).

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

220220 is a wasteful number, since it uses less digits than its factorization.

220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51 (or 38 counting only the distinct ones).

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

The square root of 220220 is about 469.2760381694. The cubic root of 220220 is about 60.3882233666.

The spelling of 220220 in words is "two hundred twenty thousand, two hundred twenty", and thus it is an iban number.

Divisors: 1 2 4 5 7 10 11 13 14 20 22 26 28 35 44 52 55 65 70 77 91 110 121 130 140 143 154 182 220 242 260 286 308 364 385 455 484 572 605 715 770 847 910 1001 1210 1430 1540 1573 1694 1820 2002 2420 2860 3146 3388 4004 4235 5005 6292 7865 8470 10010 11011 15730 16940 20020 22022 31460 44044 55055 110110 220220