844040313 has 12 divisors (see below), whose sum is σ = 1221166180. Its totient is φ = 561771936.

The previous prime is 844040299. The next prime is 844040333. The reversal of 844040313 is 313040448.

It can be written as a sum of positive squares in 2 ways, for example, as 2286144 + 841754169 = 1512^2 + 29013^2 .

It is not a de Polignac number, because 844040313 - 2¹⁰ = 844039289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (844040333) 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, 70978 + ... + 82011.

Almost surely, 2^844040313 is an apocalyptic number.

It is an amenable number.

844040313 is a deficient number, since it is larger than the sum of its proper divisors (377125867).

844040313 is a wasteful number, since it uses less digits than its factorization.

844040313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153608 (or 153605 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 844040313 is about 29052.3718997262. The cubic root of 844040313 is about 945.0491517225.

The spelling of 844040313 in words is "eight hundred forty-four million, forty thousand, three hundred thirteen".