281480 has 32 divisors (see below), whose sum is σ = 656640. Its totient is φ = 108480.

The previous prime is 281431. The next prime is 281509. The reversal of 281480 is 84182.

281480 = T₁₄₁ + T₁₄₂ + ... + T₁₆₄.

281480 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×281480³ = 66905817533376000, which contains 333 as substring.

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 281480.

It is an unprimeable number.

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, 1127 + ... + 1353.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2²⁸¹⁴⁸⁰ is an apocalyptic number.

281480 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 281480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328320).

281480 is an abundant number, since it is smaller than the sum of its proper divisors (375160).

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

281480 is a wasteful number, since it uses less digits than its factorization.

281480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 265 counting only the distinct ones).

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

The square root of 281480 is about 530.5468876546. The cubic root of 281480 is about 65.5363898562.

The spelling of 281480 in words is "two hundred eighty-one thousand, four hundred eighty".