1244440240 has 40 divisors (see below), whose sum is σ = 2971528560. Its totient is φ = 484321536.

The previous prime is 1244440193. The next prime is 1244440297. The reversal of 1244440240 is 420444421.

1244440240 = T₃₅₇₅ + T₃₅₇₆ + ... + T₃₇₅₉.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 207250 + ... + 213169.

It is an arithmetic number, because the mean of its divisors is an integer number (74288214).

Almost surely, 2^1244440240 is an apocalyptic number.

1244440240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244440240 is an abundant number, since it is smaller than the sum of its proper divisors (1727088320).

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

1244440240 is a wasteful number, since it uses less digits than its factorization.

1244440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420469 (or 420463 counting only the distinct ones).

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

The square root of 1244440240 is about 35276.6245550790. The cubic root of 1244440240 is about 1075.6178859963.

Adding to 1244440240 its reverse (420444421), we get a palindrome (1664884661).

The spelling of 1244440240 in words is "one billion, two hundred forty-four million, four hundred forty thousand, two hundred forty".