804080 has 60 divisors (see below), whose sum is σ = 2057160. Its totient is φ = 291456.

The previous prime is 804077. The next prime is 804091. The reversal of 804080 is 80408.

804080 = T₅₆ + T₅₇ + ... + T₁₇₀.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 804080.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34949 + ... + 34971.

It is an arithmetic number, because the mean of its divisors is an integer number (34286).

2⁸⁰⁴⁰⁸⁰ is an apocalyptic number.

804080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 804080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1028580).

804080 is an abundant number, since it is smaller than the sum of its proper divisors (1253080).

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

804080 is a wasteful number, since it uses less digits than its factorization.

804080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 804080 is about 896.7050797224. The cubic root of 804080 is about 92.9893231663.

804080 divided by its sum of digits (20) gives a palindrome (40204).

Adding to 804080 its reverse (80408), we get a palindrome (884488).

The spelling of 804080 in words is "eight hundred four thousand, eighty".