2444220 has 72 divisors (see below), whose sum is σ = 7635264. Its totient is φ = 632448.

The previous prime is 2444219. The next prime is 2444251. The reversal of 2444220 is 224442.

2444220 is a `hidden beast` number, since 2 + 444 + 220 = 666.

It is a super-2 number, since 2×2444220² = 11948422816800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 2444193 and 2444202.

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, 6477 + ... + 6843.

2^2444220 is an apocalyptic number.

2444220 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 2444220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3817632).

2444220 is an abundant number, since it is smaller than the sum of its proper divisors (5191044).

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

2444220 is a wasteful number, since it uses less digits than its factorization.

2444220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 414 counting only the distinct ones).

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

The square root of 2444220 is about 1563.4001407189. The cubic root of 2444220 is about 134.7038776800.

Adding to 2444220 its reverse (224442), we get a palindrome (2668662).

It can be divided in two parts, 24 and 44220, that added together give a palindrome (44244).

The spelling of 2444220 in words is "two million, four hundred forty-four thousand, two hundred twenty".