844421536 has 96 divisors (see below), whose sum is σ = 1998622080. Its totient is φ = 343526400.

The previous prime is 844421533. The next prime is 844421549. The reversal of 844421536 is 635124448.

It is a junction number, because it is equal to n+sod(n) for n = 844421495 and 844421504.

It is not an unprimeable number, because it can be changed into a prime (844421533) 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, 395191 + ... + 397321.

It is an arithmetic number, because the mean of its divisors is an integer number (20818980).

Almost surely, 2^844421536 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 844421536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999311040).

844421536 is an abundant number, since it is smaller than the sum of its proper divisors (1154200544).

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

844421536 is a wasteful number, since it uses less digits than its factorization.

844421536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238 (or 2230 counting only the distinct ones).

The product of its digits is 92160, while the sum is 37.

The square root of 844421536 is about 29058.9321207783. The cubic root of 844421536 is about 945.1914120070.

The spelling of 844421536 in words is "eight hundred forty-four million, four hundred twenty-one thousand, five hundred thirty-six".