281444 has 12 divisors (see below), whose sum is σ = 499968. Its totient is φ = 138600.

The previous prime is 281431. The next prime is 281509. The reversal of 281444 is 444182.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281444.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212 + ... + 779.

It is an arithmetic number, because the mean of its divisors is an integer number (41664).

2²⁸¹⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

281444 is a deficient number, since it is larger than the sum of its proper divisors (218524).

281444 is a wasteful number, since it uses less digits than its factorization.

281444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1064 counting only the distinct ones).

The product of its digits is 1024, while the sum is 23.

The square root of 281444 is about 530.5129593139. The cubic root of 281444 is about 65.5335958026.

The spelling of 281444 in words is "two hundred eighty-one thousand, four hundred forty-four".