844994431 has 4 divisors (see below), whose sum is σ = 874132200. Its totient is φ = 815856664.

The previous prime is 844994417. The next prime is 844994459. The reversal of 844994431 is 134499448.

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

It is a cyclic number.

It is not a de Polignac number, because 844994431 - 2⁷ = 844994303 is a prime.

It is a super-2 number, since 2×844994431² = 1428031176842027522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844994471) 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, 14568841 + ... + 14568898.

It is an arithmetic number, because the mean of its divisors is an integer number (218533050).

Almost surely, 2^844994431 is an apocalyptic number.

844994431 is a deficient number, since it is larger than the sum of its proper divisors (29137769).

844994431 is a wasteful number, since it uses less digits than its factorization.

844994431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29137768.

The product of its digits is 497664, while the sum is 46.

The square root of 844994431 is about 29068.7879176274. The cubic root of 844994431 is about 945.4051176814.

The spelling of 844994431 in words is "eight hundred forty-four million, nine hundred ninety-four thousand, four hundred thirty-one".