1286590668 has 96 divisors (see below), whose sum is σ = 3491486208. Its totient is φ = 364416000.

The previous prime is 1286590667. The next prime is 1286590673. The reversal of 1286590668 is 8660956821.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 1286590668.

It is not an unprimeable number, because it can be changed into a prime (1286590663) 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, 336946 + ... + 340742.

It is an arithmetic number, because the mean of its divisors is an integer number (36369648).

Almost surely, 2^1286590668 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 1286590668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1745743104).

1286590668 is an abundant number, since it is smaller than the sum of its proper divisors (2204895540).

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

1286590668 is a wasteful number, since it uses less digits than its factorization.

1286590668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983 (or 3981 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 1286590668 is about 35869.0767653699. The cubic root of 1286590668 is about 1087.6273808249.

The spelling of 1286590668 in words is "one billion, two hundred eighty-six million, five hundred ninety thousand, six hundred sixty-eight".