844644069 has 12 divisors (see below), whose sum is σ = 1284254400. Its totient is φ = 533459304.

The previous prime is 844644067. The next prime is 844644089. The reversal of 844644069 is 960446448.

It is not a de Polignac number, because 844644069 - 2¹ = 844644067 is a prime.

It is a super-2 number, since 2×844644069² = 1426847206593753522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844644067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2469549 + ... + 2469890.

It is an arithmetic number, because the mean of its divisors is an integer number (107021200).

Almost surely, 2^844644069 is an apocalyptic number.

It is an amenable number.

844644069 is a deficient number, since it is larger than the sum of its proper divisors (439610331).

844644069 is a wasteful number, since it uses less digits than its factorization.

844644069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939464 (or 4939461 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 844644069 is about 29062.7608633454. The cubic root of 844644069 is about 945.2744344460.

The spelling of 844644069 in words is "eight hundred forty-four million, six hundred forty-four thousand, sixty-nine".