281872 has 20 divisors (see below), whose sum is σ = 555520. Its totient is φ = 138528.

The previous prime is 281867. The next prime is 281887. The reversal of 281872 is 278182.

It is a self number, because there is not a number n which added to its sum of digits gives 281872.

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, 1153 + ... + 1375.

It is an arithmetic number, because the mean of its divisors is an integer number (27776).

2²⁸¹⁸⁷² is an apocalyptic number.

It is an amenable number.

281872 is a deficient number, since it is larger than the sum of its proper divisors (273648).

281872 is a wasteful number, since it uses less digits than its factorization.

281872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 304 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 281872 is about 530.9161892427. The cubic root of 281872 is about 65.5667985866.

The spelling of 281872 in words is "two hundred eighty-one thousand, eight hundred seventy-two".