844778423 has 8 divisors (see below), whose sum is σ = 863170560. Its totient is φ = 826403800.

The previous prime is 844778419. The next prime is 844778471. The reversal of 844778423 is 324877448.

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

It is a cyclic number.

It is not a de Polignac number, because 844778423 - 2² = 844778419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844771423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155198 + ... + 160548.

It is an arithmetic number, because the mean of its divisors is an integer number (107896320).

Almost surely, 2^844778423 is an apocalyptic number.

844778423 is a deficient number, since it is larger than the sum of its proper divisors (18392137).

844778423 is a wasteful number, since it uses less digits than its factorization.

844778423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8757.

The product of its digits is 1204224, while the sum is 47.

The square root of 844778423 is about 29065.0722173539. The cubic root of 844778423 is about 945.3245520726.

The spelling of 844778423 in words is "eight hundred forty-four million, seven hundred seventy-eight thousand, four hundred twenty-three".