1440340660 has 48 divisors (see below), whose sum is σ = 3380190912. Its totient is φ = 510982400.

The previous prime is 1440340639. The next prime is 1440340663. The reversal of 1440340660 is 660430441.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440340663) 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, 70822 + ... + 88861.

It is an arithmetic number, because the mean of its divisors is an integer number (70420644).

Almost surely, 2^1440340660 is an apocalyptic number.

1440340660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440340660 is an abundant number, since it is smaller than the sum of its proper divisors (1939850252).

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

1440340660 is a wasteful number, since it uses less digits than its factorization.

1440340660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159744 (or 159742 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1440340660 is about 37951.8202462016. The cubic root of 1440340660 is about 1129.3322757844.

The spelling of 1440340660 in words is "one billion, four hundred forty million, three hundred forty thousand, six hundred sixty".