844381 has 4 divisors (see below), whose sum is σ = 847264. Its totient is φ = 841500.

The previous prime is 844369. The next prime is 844421. The reversal of 844381 is 183448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 844381 - 2⁷ = 844253 is a prime.

It is a super-2 number, since 2×844381² = 1425958546322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (211816).

2⁸⁴⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

844381 is a deficient number, since it is larger than the sum of its proper divisors (2883).

844381 is a wasteful number, since it uses less digits than its factorization.

844381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882.

The product of its digits is 3072, while the sum is 28.

The square root of 844381 is about 918.9020622460. The cubic root of 844381 is about 94.5176287297.

It can be divided in two parts, 844 and 381, that added together give a triangular number (1225 = T₄₉).

The spelling of 844381 in words is "eight hundred forty-four thousand, three hundred eighty-one".