8120804 has 12 divisors (see below), whose sum is σ = 14352828. Its totient is φ = 4020000.

The previous prime is 8120789. The next prime is 8120807. The reversal of 8120804 is 4080218.

It can be written as a sum of positive squares in 2 ways, for example, as 5712100 + 2408704 = 2390^2 + 1552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8120804.

It is not an unprimeable number, because it can be changed into a prime (8120807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9647 + ... + 10454.

It is an arithmetic number, because the mean of its divisors is an integer number (1196069).

Almost surely, 2^8120804 is an apocalyptic number.

It is an amenable number.

8120804 is a deficient number, since it is larger than the sum of its proper divisors (6232024).

8120804 is a wasteful number, since it uses less digits than its factorization.

8120804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20206 (or 20204 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 8120804 is about 2849.7024406067. The cubic root of 8120804 is about 201.0016748621.

The spelling of 8120804 in words is "eight million, one hundred twenty thousand, eight hundred four".