805220 has 48 divisors (see below), whose sum is σ = 1928640. Its totient is φ = 279936.

The previous prime is 805219. The next prime is 805223. The reversal of 805220 is 22508.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805223) 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, 4859 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (40180).

2⁸⁰⁵²²⁰ 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 805220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964320).

805220 is an abundant number, since it is smaller than the sum of its proper divisors (1123420).

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

805220 is a wasteful number, since it uses less digits than its factorization.

805220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 805220 is about 897.3405150777. The cubic root of 805220 is about 93.0332482192.

Adding to 805220 its reverse (22508), we get a palindrome (827728).

The spelling of 805220 in words is "eight hundred five thousand, two hundred twenty".