805939818 has 8 divisors (see below), whose sum is σ = 1611879648. Its totient is φ = 268646604.

The previous prime is 805939811. The next prime is 805939831. The reversal of 805939818 is 818939508.

It is a sphenic number, since it is the product of 3 distinct primes.

805939818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (805939811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67161646 + ... + 67161657.

It is an arithmetic number, because the mean of its divisors is an integer number (201484956).

Almost surely, 2^805939818 is an apocalyptic number.

805939818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

805939818 is a wasteful number, since it uses less digits than its factorization.

805939818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134323308.

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 805939818 is about 28389.0792031020. The cubic root of 805939818 is about 930.6096199590.

The spelling of 805939818 in words is "eight hundred five million, nine hundred thirty-nine thousand, eight hundred eighteen".