8041809820 has 48 divisors (see below), whose sum is σ = 19017363456. Its totient is φ = 2829960000.

The previous prime is 8041809751. The next prime is 8041809821. The reversal of 8041809820 is 289081408.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8041809821) 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 15 ways as a sum of consecutive naturals, for example, 582756 + ... + 596395.

It is an arithmetic number, because the mean of its divisors is an integer number (396195072).

Almost surely, 2^8041809820 is an apocalyptic number.

It is an amenable number.

8041809820 is an abundant number, since it is smaller than the sum of its proper divisors (10975553636).

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

8041809820 is a wasteful number, since it uses less digits than its factorization.

8041809820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179202 (or 1179200 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 8041809820 is about 89676.1385207905. The cubic root of 8041809820 is about 2003.4780995721.

The spelling of 8041809820 in words is "eight billion, forty-one million, eight hundred nine thousand, eight hundred twenty".