805238280 has 512 divisors, whose sum is σ = 3500236800. Its totient is φ = 159667200.

The previous prime is 805238261. The next prime is 805238281. The reversal of 805238280 is 82832508.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (805238281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1912470 + ... + 1912890.

It is an arithmetic number, because the mean of its divisors is an integer number (6836400).

Almost surely, 2^805238280 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 805238280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1750118400).

805238280 is an abundant number, since it is smaller than the sum of its proper divisors (2694998520).

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

805238280 is a wasteful number, since it uses less digits than its factorization.

805238280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 805238280 is about 28376.7207407762. The cubic root of 805238280 is about 930.3395222348.

The spelling of 805238280 in words is "eight hundred five million, two hundred thirty-eight thousand, two hundred eighty".