281968568 has 32 divisors (see below), whose sum is σ = 610212960. Its totient is φ = 119644800.

The previous prime is 281968567. The next prime is 281968627. The reversal of 281968568 is 865869182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281968567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19271 + ... + 30582.

It is an arithmetic number, because the mean of its divisors is an integer number (19069155).

Almost surely, 2^281968568 is an apocalyptic number.

281968568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

281968568 is an abundant number, since it is smaller than the sum of its proper divisors (328244392).

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

281968568 is a wasteful number, since it uses less digits than its factorization.

281968568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49967 (or 49963 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 53.

The square root of 281968568 is about 16791.9197234861. The cubic root of 281968568 is about 655.7428535566.

The spelling of 281968568 in words is "two hundred eighty-one million, nine hundred sixty-eight thousand, five hundred sixty-eight".