281688116 has 12 divisors (see below), whose sum is σ = 494162340. Its totient is φ = 140498880.

The previous prime is 281688089. The next prime is 281688119. The reversal of 281688116 is 611886182.

It can be written as a sum of positive squares in 2 ways, for example, as 254083600 + 27604516 = 15940^2 + 5254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281688119) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 84455 + ... + 87726.

It is an arithmetic number, because the mean of its divisors is an integer number (41180195).

Almost surely, 2^281688116 is an apocalyptic number.

It is an amenable number.

281688116 is a deficient number, since it is larger than the sum of its proper divisors (212474224).

281688116 is a wasteful number, since it uses less digits than its factorization.

281688116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172594 (or 172592 counting only the distinct ones).

The product of its digits is 36864, while the sum is 41.

The square root of 281688116 is about 16783.5668437910. The cubic root of 281688116 is about 655.5253761246.

The spelling of 281688116 in words is "two hundred eighty-one million, six hundred eighty-eight thousand, one hundred sixteen".