1244400444 has 36 divisors (see below), whose sum is σ = 3594935344. Its totient is φ = 355542912.

The previous prime is 1244400431. The next prime is 1244400449. The reversal of 1244400444 is 4440044421.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244400449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2468797 + ... + 2469300.

Almost surely, 2^1244400444 is an apocalyptic number.

1244400444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1244400444 is an abundant number, since it is smaller than the sum of its proper divisors (2350534900).

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

1244400444 is a wasteful number, since it uses less digits than its factorization.

1244400444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938114 (or 4938109 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

The square root of 1244400444 is about 35276.0604943352. The cubic root of 1244400444 is about 1075.6064201329.

Adding to 1244400444 its reverse (4440044421), we get a palindrome (5684444865).

The spelling of 1244400444 in words is "one billion, two hundred forty-four million, four hundred thousand, four hundred forty-four".