4244220 has 144 divisors (see below), whose sum is σ = 14545440. Its totient is φ = 995328.

The previous prime is 4244183. The next prime is 4244221. The reversal of 4244220 is 224424.

4244220 = T₁₃₃ + T₁₃₄ + ... + T₃₀₂.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4244193 and 4244202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4244221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58104 + ... + 58176.

It is an arithmetic number, because the mean of its divisors is an integer number (101010).

Almost surely, 2^4244220 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 4244220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7272720).

4244220 is an abundant number, since it is smaller than the sum of its proper divisors (10301220).

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

4244220 is a wasteful number, since it uses less digits than its factorization.

4244220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4244220 is about 2060.1504799407. The cubic root of 4244220 is about 161.9071255491.

Adding to 4244220 its reverse (224424), we get a palindrome (4468644).

The spelling of 4244220 in words is "four million, two hundred forty-four thousand, two hundred twenty".