1289968662 has 64 divisors (see below), whose sum is σ = 2814497280. Its totient is φ = 392899584.

The previous prime is 1289968661. The next prime is 1289968681. The reversal of 1289968662 is 2668699821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289968661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 386533 + ... + 389855.

It is an arithmetic number, because the mean of its divisors is an integer number (43976520).

Almost surely, 2^1289968662 is an apocalyptic number.

1289968662 is an abundant number, since it is smaller than the sum of its proper divisors (1524528618).

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

1289968662 is a wasteful number, since it uses less digits than its factorization.

1289968662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477.

The product of its digits is 4478976, while the sum is 57.

The square root of 1289968662 is about 35916.1337284513. The cubic root of 1289968662 is about 1088.5784183566.

The spelling of 1289968662 in words is "one billion, two hundred eighty-nine million, nine hundred sixty-eight thousand, six hundred sixty-two".