281340 has 48 divisors (see below), whose sum is σ = 876960. Its totient is φ = 74880.

The previous prime is 281339. The next prime is 281353. The reversal of 281340 is 43182.

It is a happy number.

281340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280 + ... + 800.

It is an arithmetic number, because the mean of its divisors is an integer number (18270).

2²⁸¹³⁴⁰ is an apocalyptic number.

281340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438480).

281340 is an abundant number, since it is smaller than the sum of its proper divisors (595620).

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

281340 is a wasteful number, since it uses less digits than its factorization.

281340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 281340 is about 530.4149319165. The cubic root of 281340 is about 65.5255227536.

The spelling of 281340 in words is "two hundred eighty-one thousand, three hundred forty".