1268816688 has 30 divisors (see below), whose sum is σ = 3550924884. Its totient is φ = 422938848.

The previous prime is 1268816687. The next prime is 1268816699. The reversal of 1268816688 is 8866188621.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1268816683) 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 5 ways as a sum of consecutive naturals, for example, 4405470 + ... + 4405757.

Almost surely, 2^1268816688 is an apocalyptic number.

1268816688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1268816688 is an abundant number, since it is smaller than the sum of its proper divisors (2282108196).

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

1268816688 is a wasteful number, since it uses less digits than its factorization.

1268816688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8811241 (or 8811232 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 54.

The square root of 1268816688 is about 35620.4532256399. The cubic root of 1268816688 is about 1082.5956906308.

The spelling of 1268816688 in words is "one billion, two hundred sixty-eight million, eight hundred sixteen thousand, six hundred eighty-eight".