1244404420 has 192 divisors, whose sum is σ = 3344302080. Its totient is φ = 378943488.

The previous prime is 1244404409. The next prime is 1244404423. The reversal of 1244404420 is 244044421.

It is not an unprimeable number, because it can be changed into a prime (1244404423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6951891 + ... + 6952069.

It is an arithmetic number, because the mean of its divisors is an integer number (17418240).

Almost surely, 2^1244404420 is an apocalyptic number.

1244404420 is a gapful number since it is divisible by the number (10) 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 1244404420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1672151040).

1244404420 is an abundant number, since it is smaller than the sum of its proper divisors (2099897660).

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

1244404420 is a wasteful number, since it uses less digits than its factorization.

1244404420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 1244404420 is about 35276.1168497895. The cubic root of 1244404420 is about 1075.6075656930.

Adding to 1244404420 its reverse (244044421), we get a palindrome (1488448841).

The spelling of 1244404420 in words is "one billion, two hundred forty-four million, four hundred four thousand, four hundred twenty".