1440146864 has 20 divisors (see below), whose sum is σ = 3004922256. Its totient is φ = 664683072.

The previous prime is 1440146839. The next prime is 1440146867. The reversal of 1440146864 is 4686410441.

It is not an unprimeable number, because it can be changed into a prime (1440146867) 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 3 ways as a sum of consecutive naturals, for example, 3461684 + ... + 3462099.

Almost surely, 2^1440146864 is an apocalyptic number.

It is an amenable number.

1440146864 is an abundant number, since it is smaller than the sum of its proper divisors (1564775392).

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

1440146864 is a wasteful number, since it uses less digits than its factorization.

1440146864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6923804 (or 6923798 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 1440146864 is about 37949.2669757928. The cubic root of 1440146864 is about 1129.2816234398.

The spelling of 1440146864 in words is "one billion, four hundred forty million, one hundred forty-six thousand, eight hundred sixty-four".