844403680 has 96 divisors (see below), whose sum is σ = 2039458176. Its totient is φ = 330299904.

The previous prime is 844403671. The next prime is 844403689. The reversal of 844403680 is 86304448.

It is an interprime number because it is at equal distance from previous prime (844403671) and next prime (844403689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844403689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2433267 + ... + 2433613.

It is an arithmetic number, because the mean of its divisors is an integer number (21244356).

Almost surely, 2^844403680 is an apocalyptic number.

844403680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 844403680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019729088).

844403680 is an abundant number, since it is smaller than the sum of its proper divisors (1195054496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

844403680 is a wasteful number, since it uses less digits than its factorization.

844403680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 844403680 is about 29058.6248814358. The cubic root of 844403680 is about 945.1847496723.

The spelling of 844403680 in words is "eight hundred forty-four million, four hundred three thousand, six hundred eighty".