281916 has 36 divisors (see below), whose sum is σ = 733824. Its totient is φ = 91200.

The previous prime is 281893. The next prime is 281921. The reversal of 281916 is 619182.

281916 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 281916.

It is a congruent number.

It is an unprimeable number.

281916 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1381 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (20384).

2²⁸¹⁹¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366912).

281916 is an abundant number, since it is smaller than the sum of its proper divisors (451908).

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

281916 is a wasteful number, since it uses less digits than its factorization.

281916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 237 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 281916 is about 530.9576254279. The cubic root of 281916 is about 65.5702100512.

It can be divided in two parts, 2 and 81916, that added together give a palindrome (81918).

The spelling of 281916 in words is "two hundred eighty-one thousand, nine hundred sixteen".