805855824 has 80 divisors (see below), whose sum is σ = 2337072640. Its totient is φ = 265835520.

The previous prime is 805855823. The next prime is 805855837. The reversal of 805855824 is 428558508.

It is a self number, because there is not a number n which added to its sum of digits gives 805855824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805855823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32289 + ... + 51519.

It is an arithmetic number, because the mean of its divisors is an integer number (29213408).

Almost surely, 2^805855824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805855824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168536320).

805855824 is an abundant number, since it is smaller than the sum of its proper divisors (1531216816).

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

805855824 is a wasteful number, since it uses less digits than its factorization.

805855824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19345 (or 19333 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 45.

The square root of 805855824 is about 28387.5998280940. The cubic root of 805855824 is about 930.5772898610.

The spelling of 805855824 in words is "eight hundred five million, eight hundred fifty-five thousand, eight hundred twenty-four".