804378285 has 12 divisors (see below), whose sum is σ = 1394255772. Its totient is φ = 429001728.

The previous prime is 804378283. The next prime is 804378343. The reversal of 804378285 is 582873408.

It can be written as a sum of positive squares in 2 ways, for example, as 116575209 + 687803076 = 10797^2 + 26226^2 .

It is not a de Polignac number, because 804378285 - 2¹ = 804378283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 17875073 = 804378285 / (8 + 0 + 4 + 3 + 7 + 8 + 2 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 804378285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804378283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8937492 + ... + 8937581.

It is an arithmetic number, because the mean of its divisors is an integer number (116187981).

Almost surely, 2^804378285 is an apocalyptic number.

It is an amenable number.

804378285 is a deficient number, since it is larger than the sum of its proper divisors (589877487).

804378285 is a wasteful number, since it uses less digits than its factorization.

804378285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17875084 (or 17875081 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 804378285 is about 28361.5635147289. The cubic root of 804378285 is about 930.0082031881.

The spelling of 804378285 in words is "eight hundred four million, three hundred seventy-eight thousand, two hundred eighty-five".