805241820 has 24 divisors (see below), whose sum is σ = 2254677264. Its totient is φ = 214731136.

The previous prime is 805241813. The next prime is 805241851. The reversal of 805241820 is 28142508.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6710289 + ... + 6710408.

It is an arithmetic number, because the mean of its divisors is an integer number (93944886).

Almost surely, 2^805241820 is an apocalyptic number.

It is an amenable number.

805241820 is an abundant number, since it is smaller than the sum of its proper divisors (1449435444).

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

805241820 is a wasteful number, since it uses less digits than its factorization.

805241820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13420709 (or 13420707 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 805241820 is about 28376.7831157797. The cubic root of 805241820 is about 930.3408855568.

The spelling of 805241820 in words is "eight hundred five million, two hundred forty-one thousand, eight hundred twenty".