281368 has 8 divisors (see below), whose sum is σ = 527580. Its totient is φ = 140680.

The previous prime is 281363. The next prime is 281381. The reversal of 281368 is 863182.

281368 is nontrivially palindromic in base 13.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17578 + ... + 17593.

2²⁸¹³⁶⁸ is an apocalyptic number.

It is an amenable number.

281368 is a deficient number, since it is larger than the sum of its proper divisors (246212).

281368 is a wasteful number, since it uses less digits than its factorization.

281368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35177 (or 35173 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 281368 is about 530.4413256902. The cubic root of 281368 is about 65.5276964625.

The spelling of 281368 in words is "two hundred eighty-one thousand, three hundred sixty-eight".