805209854 has 16 divisors (see below), whose sum is σ = 1272602880. Its totient is φ = 381049560.

The previous prime is 805209833. The next prime is 805209859. The reversal of 805209854 is 458902508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805209859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32309 + ... + 51519.

It is an arithmetic number, because the mean of its divisors is an integer number (79537680).

Almost surely, 2^805209854 is an apocalyptic number.

805209854 is a deficient number, since it is larger than the sum of its proper divisors (467393026).

805209854 is a wasteful number, since it uses less digits than its factorization.

805209854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20335.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 805209854 is about 28376.2198680515. The cubic root of 805209854 is about 930.3285746916.

The spelling of 805209854 in words is "eight hundred five million, two hundred nine thousand, eight hundred fifty-four".