281228 has 12 divisors (see below), whose sum is σ = 496272. Its totient is φ = 139440.

The previous prime is 281227. The next prime is 281233. The reversal of 281228 is 822182.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (281227) 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 in 3 ways as a sum of consecutive naturals, for example, 458 + ... + 878.

It is an arithmetic number, because the mean of its divisors is an integer number (41356).

2²⁸¹²²⁸ is an apocalyptic number.

It is an amenable number.

281228 is a deficient number, since it is larger than the sum of its proper divisors (215044).

281228 is a wasteful number, since it uses less digits than its factorization.

281228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 590 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 281228 is about 530.3093436854. The cubic root of 281228 is about 65.5168264755.

The spelling of 281228 in words is "two hundred eighty-one thousand, two hundred twenty-eight".