805768636 has 24 divisors (see below), whose sum is σ = 1428731136. Its totient is φ = 397589040.

The previous prime is 805768633. The next prime is 805768643. The reversal of 805768636 is 636867508.

It is a happy number.

It is a super-2 number, since 2×805768636² = 1298526189522600992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 805768636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805768633) 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 7 ways as a sum of consecutive naturals, for example, 112515 + ... + 119461.

It is an arithmetic number, because the mean of its divisors is an integer number (59530464).

Almost surely, 2^805768636 is an apocalyptic number.

It is an amenable number.

805768636 is a deficient number, since it is larger than the sum of its proper divisors (622962500).

805768636 is a wasteful number, since it uses less digits than its factorization.

805768636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329 (or 7327 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 805768636 is about 28386.0641160412. The cubic root of 805768636 is about 930.5437279852.

It can be divided in two parts, 805768 and 636, that added together give a square (806404 = 898²).

The spelling of 805768636 in words is "eight hundred five million, seven hundred sixty-eight thousand, six hundred thirty-six".