281960 has 64 divisors (see below), whose sum is σ = 777600. Its totient is φ = 89856.

The previous prime is 281959. The next prime is 281971. The reversal of 281960 is 69182.

It is a Cunningham number, because it is equal to 531²-1.

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, 5294 + ... + 5346.

It is an arithmetic number, because the mean of its divisors is an integer number (12150).

2²⁸¹⁹⁶⁰ is an apocalyptic number.

281960 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 281960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388800).

281960 is an abundant number, since it is smaller than the sum of its proper divisors (495640).

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

281960 is a wasteful number, since it uses less digits than its factorization.

281960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 281960 is about 530.9990583796. Note that the first 3 decimals coincide. The cubic root of 281960 is about 65.5736211609.

The spelling of 281960 in words is "two hundred eighty-one thousand, nine hundred sixty".