281826 has 32 divisors (see below), whose sum is σ = 665280. Its totient is φ = 88128.

The previous prime is 281807. The next prime is 281833. The reversal of 281826 is 628182.

281826 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 281826.

It is an unprimeable number.

281826 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, 765 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (20790).

2²⁸¹⁸²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332640).

281826 is an abundant number, since it is smaller than the sum of its proper divisors (383454).

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

281826 is a wasteful number, since it uses less digits than its factorization.

281826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 329 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 281826 is about 530.8728661365. The cubic root of 281826 is about 65.5632316759.

The spelling of 281826 in words is "two hundred eighty-one thousand, eight hundred twenty-six".