1440421140 has 24 divisors (see below), whose sum is σ = 4033179360. Its totient is φ = 384112288.

The previous prime is 1440421133. The next prime is 1440421153. The reversal of 1440421140 is 411240441.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12003450 + ... + 12003569.

It is an arithmetic number, because the mean of its divisors is an integer number (168049140).

Almost surely, 2^1440421140 is an apocalyptic number.

1440421140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440421140 is an abundant number, since it is smaller than the sum of its proper divisors (2592758220).

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

1440421140 is a wasteful number, since it uses less digits than its factorization.

1440421140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24007031 (or 24007029 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1440421140 is about 37952.8805230907. The cubic root of 1440421140 is about 1129.3533094586.

Adding to 1440421140 its reverse (411240441), we get a palindrome (1851661581).

The spelling of 1440421140 in words is "one billion, four hundred forty million, four hundred twenty-one thousand, one hundred forty".