804505020 has 192 divisors, whose sum is σ = 2538708480. Its totient is φ = 188697600.

The previous prime is 804505019. The next prime is 804505067. The reversal of 804505020 is 20505408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3812715 + ... + 3812925.

It is an arithmetic number, because the mean of its divisors is an integer number (13222440).

Almost surely, 2^804505020 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 804505020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1269354240).

804505020 is an abundant number, since it is smaller than the sum of its proper divisors (1734203460).

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

804505020 is a wasteful number, since it uses less digits than its factorization.

804505020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 804505020 is about 28363.7977005901. The cubic root of 804505020 is about 930.0570435585.

The spelling of 804505020 in words is "eight hundred four million, five hundred five thousand, twenty".