844340 has 48 divisors (see below), whose sum is σ = 2093952. Its totient is φ = 279936.

The previous prime is 844321. The next prime is 844351. The reversal of 844340 is 43448.

844340 = T₁₁₉ + T₁₂₀ + ... + T₁₈₈.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 844340.

It is an unprimeable number.

844340 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, 5099 + ... + 5261.

It is an arithmetic number, because the mean of its divisors is an integer number (43624).

2⁸⁴⁴³⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 844340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046976).

844340 is an abundant number, since it is smaller than the sum of its proper divisors (1249612).

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

844340 is a wasteful number, since it uses less digits than its factorization.

844340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 844340 is about 918.8797527424. The cubic root of 844340 is about 94.5160988968.

Adding to 844340 its reverse (43448), we get a palindrome (887788).

The spelling of 844340 in words is "eight hundred forty-four thousand, three hundred forty".