281380 has 24 divisors (see below), whose sum is σ = 645120. Its totient is φ = 102240.

The previous prime is 281363. The next prime is 281381. The reversal of 281380 is 83182.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281381) 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 7 ways as a sum of consecutive naturals, for example, 420 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (26880).

2²⁸¹³⁸⁰ is an apocalyptic number.

281380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281380 is an abundant number, since it is smaller than the sum of its proper divisors (363740).

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

281380 is a wasteful number, since it uses less digits than its factorization.

281380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 281380 is about 530.4526369055. The cubic root of 281380 is about 65.5286280079.

The spelling of 281380 in words is "two hundred eighty-one thousand, three hundred eighty".