844769856 has 112 divisors (see below), whose sum is σ = 2563164800. Its totient is φ = 240537600.

The previous prime is 844769819. The next prime is 844769879. The reversal of 844769856 is 658967448.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×844769856² = 1427272219212521472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 844769796 and 844769805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468156 + ... + 469956.

It is an arithmetic number, because the mean of its divisors is an integer number (22885400).

Almost surely, 2^844769856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 844769856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281582400).

844769856 is an abundant number, since it is smaller than the sum of its proper divisors (1718394944).

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

844769856 is a wasteful number, since it uses less digits than its factorization.

844769856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172 (or 2162 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 57.

The square root of 844769856 is about 29064.9248407767. The cubic root of 844769856 is about 945.3213565116.

The spelling of 844769856 in words is "eight hundred forty-four million, seven hundred sixty-nine thousand, eight hundred fifty-six".