1289368668 has 48 divisors (see below), whose sum is σ = 3440433920. Its totient is φ = 368164224.

The previous prime is 1289368657. The next prime is 1289368673. The reversal of 1289368668 is 8668639821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171288 + ... + 178656.

Almost surely, 2^1289368668 is an apocalyptic number.

It is an amenable number.

1289368668 is an abundant number, since it is smaller than the sum of its proper divisors (2151065252).

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

1289368668 is a wasteful number, since it uses less digits than its factorization.

1289368668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9466 (or 9464 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The square root of 1289368668 is about 35907.7800483405. The cubic root of 1289368668 is about 1088.4096179227.

The spelling of 1289368668 in words is "one billion, two hundred eighty-nine million, three hundred sixty-eight thousand, six hundred sixty-eight".