281328 has 20 divisors (see below), whose sum is σ = 726888. Its totient is φ = 93760.

The previous prime is 281327. The next prime is 281339. The reversal of 281328 is 823182.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 281298 and 281307.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281328.

It is not an unprimeable number, because it can be changed into a prime (281321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2883 + ... + 2978.

2²⁸¹³²⁸ is an apocalyptic number.

It is an amenable number.

281328 is an abundant number, since it is smaller than the sum of its proper divisors (445560).

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

281328 is a wasteful number, since it uses less digits than its factorization.

281328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872 (or 5866 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 281328 is about 530.4036198971. The cubic root of 281328 is about 65.5245911199.

The spelling of 281328 in words is "two hundred eighty-one thousand, three hundred twenty-eight".