281968868 has 24 divisors (see below), whose sum is σ = 545190912. Its totient is φ = 126921344.

The previous prime is 281968837. The next prime is 281968877. The reversal of 281968868 is 868869182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88580 + ... + 91707.

It is an arithmetic number, because the mean of its divisors is an integer number (22716288).

Almost surely, 2^281968868 is an apocalyptic number.

It is an amenable number.

281968868 is a deficient number, since it is larger than the sum of its proper divisors (263222044).

281968868 is a wasteful number, since it uses less digits than its factorization.

281968868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180331 (or 180329 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 56.

The square root of 281968868 is about 16791.9286563515. The cubic root of 281968868 is about 655.7430861154.

The spelling of 281968868 in words is "two hundred eighty-one million, nine hundred sixty-eight thousand, eight hundred sixty-eight".