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BaseRepresentation
bin10000000111010011011100
321221121112121
4100013103130
52040133340
6230312324
750622340
oct20072334
97847477
104224220
1124257a0
1214b86a4
13b4b950
147bd620
1558694a
hex4074dc

4224220 has 96 divisors (see below), whose sum is σ = 11966976. Its totient is φ = 1209600.

The previous prime is 4224197. The next prime is 4224229. The reversal of 4224220 is 224224.

Adding to 4224220 its reverse (224224), we get a palindrome (4448444).

It can be divided in two parts, 4224 and 220, that added together give a palindrome (4444).

It is a junction number, because it is equal to n+sod(n) for n = 4224194 and 4224203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4224229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19915 + ... + 20125.

It is an arithmetic number, because the mean of its divisors is an integer number (124656).

Almost surely, 24224220 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 4224220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5983488).

4224220 is an abundant number, since it is smaller than the sum of its proper divisors (7742756).

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

4224220 is a wasteful number, since it uses less digits than its factorization.

4224220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 4224220 is about 2055.2907336920. The cubic root of 4224220 is about 161.6524071928.

The spelling of 4224220 in words is "four million, two hundred twenty-four thousand, two hundred twenty".