281360 has 20 divisors (see below), whose sum is σ = 654348. Its totient is φ = 112512.

The previous prime is 281357. The next prime is 281363. The reversal of 281360 is 63182.

It is an interprime number because it is at equal distance from previous prime (281357) and next prime (281363).

It can be written as a sum of positive squares in 2 ways, for example, as 200704 + 80656 = 448^2 + 284^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281360.

It is not an unprimeable number, because it can be changed into a prime (281363) 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, 1679 + ... + 1838.

2²⁸¹³⁶⁰ is an apocalyptic number.

281360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281360 is an abundant number, since it is smaller than the sum of its proper divisors (372988).

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

281360 is a wasteful number, since it uses less digits than its factorization.

281360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530 (or 3524 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 281360 is about 530.4337847460. The cubic root of 281360 is about 65.5270754175.

The spelling of 281360 in words is "two hundred eighty-one thousand, three hundred sixty".