281934 has 32 divisors (see below), whose sum is σ = 656640. Its totient is φ = 89496.

The previous prime is 281933. The next prime is 281947. The reversal of 281934 is 439182.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 281898 and 281907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129 + ... + 1355.

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

2²⁸¹⁹³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328320).

281934 is an abundant number, since it is smaller than the sum of its proper divisors (374706).

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

281934 is a wasteful number, since it uses less digits than its factorization.

281934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 255 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 281934 is about 530.9745756625. The cubic root of 281934 is about 65.5716055481.

Adding to 281934 its sum of digits (27), we get a square (281961 = 531²).

The spelling of 281934 in words is "two hundred eighty-one thousand, nine hundred thirty-four".