805779020 has 12 divisors (see below), whose sum is σ = 1692135984. Its totient is φ = 322311600.

The previous prime is 805779019. The next prime is 805779031. The reversal of 805779020 is 20977508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20144456 + ... + 20144495.

It is an arithmetic number, because the mean of its divisors is an integer number (141011332).

Almost surely, 2^805779020 is an apocalyptic number.

It is an amenable number.

805779020 is an abundant number, since it is smaller than the sum of its proper divisors (886356964).

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

805779020 is a wasteful number, since it uses less digits than its factorization.

805779020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40288960 (or 40288958 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 805779020 is about 28386.2470221056. The cubic root of 805779020 is about 930.5477252967.

The spelling of 805779020 in words is "eight hundred five million, seven hundred seventy-nine thousand, twenty".