1285688568 has 32 divisors (see below), whose sum is σ = 3222507600. Its totient is φ = 427458048.

The previous prime is 1285688533. The next prime is 1285688587. The reversal of 1285688568 is 8658865821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 59521 + ... + 78192.

Almost surely, 2^1285688568 is an apocalyptic number.

It is an amenable number.

1285688568 is an abundant number, since it is smaller than the sum of its proper divisors (1936819032).

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

1285688568 is a wasteful number, since it uses less digits than its factorization.

1285688568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138111 (or 138107 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 57.

The square root of 1285688568 is about 35856.4996618465. The cubic root of 1285688568 is about 1087.3731227855.

The spelling of 1285688568 in words is "one billion, two hundred eighty-five million, six hundred eighty-eight thousand, five hundred sixty-eight".