1440379816 has 32 divisors (see below), whose sum is σ = 2845670400. Its totient is φ = 681609600.

The previous prime is 1440379783. The next prime is 1440379817. The reversal of 1440379816 is 6189730441.

It is not an unprimeable number, because it can be changed into a prime (1440379817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170836 + ... + 179068.

It is an arithmetic number, because the mean of its divisors is an integer number (88927200).

Almost surely, 2^1440379816 is an apocalyptic number.

It is an amenable number.

1440379816 is a deficient number, since it is larger than the sum of its proper divisors (1405290584).

1440379816 is a wasteful number, since it uses less digits than its factorization.

1440379816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9409 (or 9405 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1440379816 is about 37952.3361072807. The cubic root of 1440379816 is about 1129.3425094129.

The spelling of 1440379816 in words is "one billion, four hundred forty million, three hundred seventy-nine thousand, eight hundred sixteen".