1244424440 has 64 divisors (see below), whose sum is σ = 3203928000. Its totient is φ = 426129408.

The previous prime is 1244424431. The next prime is 1244424443. The reversal of 1244424440 is 444244421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244424443) 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, 271286 + ... + 275834.

It is an arithmetic number, because the mean of its divisors is an integer number (50061375).

Almost surely, 2^1244424440 is an apocalyptic number.

1244424440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244424440 is an abundant number, since it is smaller than the sum of its proper divisors (1959503560).

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

1244424440 is a wasteful number, since it uses less digits than its factorization.

1244424440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5544 (or 5540 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 29.

The square root of 1244424440 is about 35276.4006100396. The cubic root of 1244424440 is about 1075.6133337931.

Adding to 1244424440 its reverse (444244421), we get a palindrome (1688668861).

The spelling of 1244424440 in words is "one billion, two hundred forty-four million, four hundred twenty-four thousand, four hundred forty".