844398085 has 4 divisors (see below), whose sum is σ = 1013277708. Its totient is φ = 675518464.

The previous prime is 844398083. The next prime is 844398089. The reversal of 844398085 is 580893448.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 289748484 + 554649601 = 17022^2 + 23551^2 .

It is a cyclic number.

It is not a de Polignac number, because 844398085 - 2¹ = 844398083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844398083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84439804 + ... + 84439813.

It is an arithmetic number, because the mean of its divisors is an integer number (253319427).

Almost surely, 2^844398085 is an apocalyptic number.

It is an amenable number.

844398085 is a deficient number, since it is larger than the sum of its proper divisors (168879623).

844398085 is a wasteful number, since it uses less digits than its factorization.

844398085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168879622.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The square root of 844398085 is about 29058.5286103753. The cubic root of 844398085 is about 945.1826620766.

The spelling of 844398085 in words is "eight hundred forty-four million, three hundred ninety-eight thousand, eighty-five".