1440440240 has 20 divisors (see below), whose sum is σ = 3349023744. Its totient is φ = 576176064.

The previous prime is 1440440233. The next prime is 1440440269. The reversal of 1440440240 is 420440441.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1440440240² = 4149736170022515200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9002672 + ... + 9002831.

Almost surely, 2^1440440240 is an apocalyptic number.

1440440240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440440240 is an abundant number, since it is smaller than the sum of its proper divisors (1908583504).

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

1440440240 is a wasteful number, since it uses less digits than its factorization.

1440440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18005516 (or 18005510 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 1440440240 is about 37953.1321500611. The cubic root of 1440440240 is about 1129.3583011823.

Adding to 1440440240 its reverse (420440441), we get a palindrome (1860880681).

The spelling of 1440440240 in words is "one billion, four hundred forty million, four hundred forty thousand, two hundred forty".