844068636 has 18 divisors (see below), whose sum is σ = 2133618032. Its totient is φ = 281356200.

The previous prime is 844068607. The next prime is 844068637. The reversal of 844068636 is 636860448.

844068636 is a `hidden beast` number, since 8 + 4 + 4 + 0 + 6 + 8 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 844068591 and 844068600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844068637) 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 5 ways as a sum of consecutive naturals, for example, 11723140 + ... + 11723211.

Almost surely, 2^844068636 is an apocalyptic number.

It is an amenable number.

844068636 is an abundant number, since it is smaller than the sum of its proper divisors (1289549396).

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

844068636 is a wasteful number, since it uses less digits than its factorization.

844068636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23446361 (or 23446356 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 844068636 is about 29052.8593429287. The cubic root of 844068636 is about 945.0597224370.

The spelling of 844068636 in words is "eight hundred forty-four million, sixty-eight thousand, six hundred thirty-six".