281982 has 8 divisors (see below), whose sum is σ = 563976. Its totient is φ = 93992.

The previous prime is 281971. The next prime is 281989. The reversal of 281982 is 289182.

It is a sphenic number, since it is the product of 3 distinct primes.

281982 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281989) 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, 23493 + ... + 23504.

It is an arithmetic number, because the mean of its divisors is an integer number (70497).

2²⁸¹⁹⁸² is an apocalyptic number.

281982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

281982 is a wasteful number, since it uses less digits than its factorization.

281982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47002.

The product of its digits is 2304, while the sum is 30.

The square root of 281982 is about 531.0197736431. The cubic root of 281982 is about 65.5753265826.

The spelling of 281982 in words is "two hundred eighty-one thousand, nine hundred eighty-two".