1440334464 has 64 divisors (see below), whose sum is σ = 3834008640. Its totient is φ = 479092736.

The previous prime is 1440334447. The next prime is 1440334481. The reversal of 1440334464 is 4644330441.

It is an interprime number because it is at equal distance from previous prime (1440334447) and next prime (1440334481).

It is a tau number, because it is divible by the number of its divisors (64).

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, 189424 + ... + 196880.

It is an arithmetic number, because the mean of its divisors is an integer number (59906385).

Almost surely, 2^1440334464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440334464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1917004320).

1440334464 is an abundant number, since it is smaller than the sum of its proper divisors (2393674176).

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

1440334464 is an equidigital number, since it uses as much as digits as its factorization.

1440334464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7977 (or 7965 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

The square root of 1440334464 is about 37951.7386163006. The cubic root of 1440334464 is about 1129.3306564099.

The spelling of 1440334464 in words is "one billion, four hundred forty million, three hundred thirty-four thousand, four hundred sixty-four".