805478 has 4 divisors (see below), whose sum is σ = 1208220. Its totient is φ = 402738.

The previous prime is 805471. The next prime is 805487. The reversal of 805478 is 874508.

It is a semiprime because it is the product of two primes.

It is a Curzon 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 805478.

It is not an unprimeable number, because it can be changed into a prime (805471) by changing a digit.

805478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201368 + ... + 201371.

It is an arithmetic number, because the mean of its divisors is an integer number (302055).

2⁸⁰⁵⁴⁷⁸ is an apocalyptic number.

805478 is a deficient number, since it is larger than the sum of its proper divisors (402742).

805478 is a wasteful number, since it uses less digits than its factorization.

805478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402741.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 805478 is about 897.4842617004. The cubic root of 805478 is about 93.0431833984.

The spelling of 805478 in words is "eight hundred five thousand, four hundred seventy-eight".