22444420 has 48 divisors (see below), whose sum is σ = 50295168. Its totient is φ = 8384000.

The previous prime is 22444393. The next prime is 22444423. The reversal of 22444420 is 2444422.

It is a junction number, because it is equal to n+sod(n) for n = 22444391 and 22444400.

It is not an unprimeable number, because it can be changed into a prime (22444423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85209 + ... + 85471.

It is an arithmetic number, because the mean of its divisors is an integer number (1047816).

Almost surely, 2^22444420 is an apocalyptic number.

22444420 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 22444420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25147584).

22444420 is an abundant number, since it is smaller than the sum of its proper divisors (27850748).

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

22444420 is a wasteful number, since it uses less digits than its factorization.

22444420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 22444420 is about 4737.5542213256. The cubic root of 22444420 is about 282.0781601835.

Adding to 22444420 its reverse (2444422), we get a palindrome (24888842).

It can be divided in two parts, 224 and 44420, that added together give a palindrome (44644).

The spelling of 22444420 in words is "twenty-two million, four hundred forty-four thousand, four hundred twenty".