804408020 has 48 divisors (see below), whose sum is σ = 1842274560. Its totient is φ = 293245056.

The previous prime is 804408019. The next prime is 804408047. The reversal of 804408020 is 20804408.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 959 + ... + 40121.

It is an arithmetic number, because the mean of its divisors is an integer number (38380720).

Almost surely, 2^804408020 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 804408020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921137280).

804408020 is an abundant number, since it is smaller than the sum of its proper divisors (1037866540).

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

804408020 is a wasteful number, since it uses less digits than its factorization.

804408020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39264 (or 39262 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 804408020 is about 28362.0877228740. The cubic root of 804408020 is about 930.0196627438.

The spelling of 804408020 in words is "eight hundred four million, four hundred eight thousand, twenty".