1289384464 has 45 divisors (see below), whose sum is σ = 2565899791. Its totient is φ = 627671840.

The previous prime is 1289384461. The next prime is 1289384471. The reversal of 1289384464 is 4644839821.

The square root of 1289384464 is 35908.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289384461) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 6750609 + ... + 6750799.

Almost surely, 2^1289384464 is an apocalyptic number.

1289384464 is the 35908-th square number.

It is an amenable number.

1289384464 is a deficient number, since it is larger than the sum of its proper divisors (1276515327).

1289384464 is an frugal number, since it uses more digits than its factorization.

1289384464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 240 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

The cubic root of 1289384464 is about 1088.4140625910.

Multiplying 1289384464 by its sum of digits (49), we get a square (63179838736 = 251356²).

The spelling of 1289384464 in words is "one billion, two hundred eighty-nine million, three hundred eighty-four thousand, four hundred sixty-four".