804128 has 24 divisors (see below), whose sum is σ = 1705788. Its totient is φ = 370944.

The previous prime is 804127. The next prime is 804157. The reversal of 804128 is 821408.

It can be written as a sum of positive squares in 2 ways, for example, as 795664 + 8464 = 892^2 + 92^2 .

It is not an unprimeable number, because it can be changed into a prime (804127) 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, 551 + ... + 1382.

2⁸⁰⁴¹²⁸ is an apocalyptic number.

It is an amenable number.

804128 is an abundant number, since it is smaller than the sum of its proper divisors (901660).

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

804128 is a wasteful number, since it uses less digits than its factorization.

804128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 1948 counting only the distinct ones).

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

The square root of 804128 is about 896.7318439757. The cubic root of 804128 is about 92.9911734792.

The spelling of 804128 in words is "eight hundred four thousand, one hundred twenty-eight".