844211805 has 16 divisors (see below), whose sum is σ = 1354617600. Its totient is φ = 448953408.

The previous prime is 844211777. The next prime is 844211807. The reversal of 844211805 is 508112448.

844211805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 844211805 - 2⁸ = 844211549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844211807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75397 + ... + 85866.

It is an arithmetic number, because the mean of its divisors is an integer number (84663600).

Almost surely, 2^844211805 is an apocalyptic number.

It is an amenable number.

844211805 is a deficient number, since it is larger than the sum of its proper divisors (510405795).

844211805 is a wasteful number, since it uses less digits than its factorization.

844211805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161620.

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 844211805 is about 29055.3231783782. The cubic root of 844211805 is about 945.1131523756.

The spelling of 844211805 in words is "eight hundred forty-four million, two hundred eleven thousand, eight hundred five".