813440344 has 16 divisors (see below), whose sum is σ = 1614918600. Its totient is φ = 382795392.

The previous prime is 813440339. The next prime is 813440413. The reversal of 813440344 is 443044318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2990454 + ... + 2990725.

Almost surely, 2^813440344 is an apocalyptic number.

It is an amenable number.

813440344 is a deficient number, since it is larger than the sum of its proper divisors (801478256).

813440344 is a wasteful number, since it uses less digits than its factorization.

813440344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5981202 (or 5981198 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 813440344 is about 28520.8755826325. The cubic root of 813440344 is about 933.4876344664.

The spelling of 813440344 in words is "eight hundred thirteen million, four hundred forty thousand, three hundred forty-four".