844455 has 16 divisors (see below), whose sum is σ = 1422720. Its totient is φ = 426528.

The previous prime is 844453. The next prime is 844457. The reversal of 844455 is 554448.

It is an interprime number because it is at equal distance from previous prime (844453) and next prime (844457).

It is not a de Polignac number, because 844455 - 2¹ = 844453 is a prime.

844455 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844453) 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 15 ways as a sum of consecutive naturals, for example, 1197 + ... + 1766.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2⁸⁴⁴⁴⁵⁵ is an apocalyptic number.

844455 is a deficient number, since it is larger than the sum of its proper divisors (578265).

844455 is a wasteful number, since it uses less digits than its factorization.

844455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990.

The product of its digits is 12800, while the sum is 30.

The square root of 844455 is about 918.9423268084. The cubic root of 844455 is about 94.5203897662.

The spelling of 844455 in words is "eight hundred forty-four thousand, four hundred fifty-five".