804191820 has 24 divisors (see below), whose sum is σ = 2251737264. Its totient is φ = 214451136.

The previous prime is 804191809. The next prime is 804191827. The reversal of 804191820 is 28191408.

It is not an unprimeable number, because it can be changed into a prime (804191827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6701539 + ... + 6701658.

It is an arithmetic number, because the mean of its divisors is an integer number (93822386).

Almost surely, 2^804191820 is an apocalyptic number.

It is an amenable number.

804191820 is an abundant number, since it is smaller than the sum of its proper divisors (1447545444).

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

804191820 is a wasteful number, since it uses less digits than its factorization.

804191820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13403209 (or 13403207 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 804191820 is about 28358.2760406905. The cubic root of 804191820 is about 929.9363351030.

The spelling of 804191820 in words is "eight hundred four million, one hundred ninety-one thousand, eight hundred twenty".