266844 has 24 divisors (see below), whose sum is σ = 640528. Its totient is φ = 86400.

The previous prime is 266839. The next prime is 266863. The reversal of 266844 is 448662.

266844 = T₂₃₉ + T₂₄₀ + ... + T₂₄₇.

It is a congruent number.

It is an unprimeable number.

266844 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144 + ... + 744.

2²⁶⁶⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

266844 is an abundant number, since it is smaller than the sum of its proper divisors (373684).

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

266844 is a wasteful number, since it uses less digits than its factorization.

266844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 643 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 266844 is about 516.5694532200. The cubic root of 266844 is about 64.3802235998.

The spelling of 266844 in words is "two hundred sixty-six thousand, eight hundred forty-four".