844938381 has 8 divisors (see below), whose sum is σ = 1287525184. Its totient is φ = 482821920.

The previous prime is 844938371. The next prime is 844938383. The reversal of 844938381 is 183839448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 844938381 - 2¹⁷ = 844807309 is a prime.

It is a super-2 number, since 2×844938381² = 1427841735373802322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 844938381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844938383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20117560 + ... + 20117601.

It is an arithmetic number, because the mean of its divisors is an integer number (160940648).

Almost surely, 2^844938381 is an apocalyptic number.

It is an amenable number.

844938381 is a deficient number, since it is larger than the sum of its proper divisors (442586803).

844938381 is a wasteful number, since it uses less digits than its factorization.

844938381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40235171.

The product of its digits is 663552, while the sum is 48.

The square root of 844938381 is about 29067.8238091537. The cubic root of 844938381 is about 945.3842137454.

The spelling of 844938381 in words is "eight hundred forty-four million, nine hundred thirty-eight thousand, three hundred eighty-one".