281946 has 32 divisors (see below), whose sum is σ = 662400. Its totient is φ = 79968.

The previous prime is 281933. The next prime is 281947. The reversal of 281946 is 649182.

It is a d-powerful number, because it can be written as 2⁹ + 8³ + 9³ + 1 + 4⁴ + 6⁷ .

It is not an unprimeable number, because it can be changed into a prime (281947) by changing a digit.

281946 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 15 ways as a sum of consecutive naturals, for example, 1990 + ... + 2126.

It is an arithmetic number, because the mean of its divisors is an integer number (20700).

2²⁸¹⁹⁴⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331200).

281946 is an abundant number, since it is smaller than the sum of its proper divisors (380454).

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

281946 is a wasteful number, since it uses less digits than its factorization.

281946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 149 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 281946 is about 530.9858755184. The cubic root of 281946 is about 65.5725358463.

Subtracting 281946 from its reverse (649182), we obtain a square (367236 = 606²).

The spelling of 281946 in words is "two hundred eighty-one thousand, nine hundred forty-six".