805840443 has 96 divisors (see below), whose sum is σ = 1358622720. Its totient is φ = 457205760.

The previous prime is 805840421. The next prime is 805840463. The reversal of 805840443 is 344048508.

It is not a de Polignac number, because 805840443 - 2⁸ = 805840187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 805840398 and 805840407.

It is not an unprimeable number, because it can be changed into a prime (805840463) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 9054343 + ... + 9054431.

It is an arithmetic number, because the mean of its divisors is an integer number (14152320).

Almost surely, 2^805840443 is an apocalyptic number.

805840443 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

805840443 is a deficient number, since it is larger than the sum of its proper divisors (552782277).

805840443 is a wasteful number, since it uses less digits than its factorization.

805840443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 805840443 is about 28387.3289162612. The cubic root of 805840443 is about 930.5713693228.

The spelling of 805840443 in words is "eight hundred five million, eight hundred forty thousand, four hundred forty-three".