823478 has 4 divisors (see below), whose sum is σ = 1235220. Its totient is φ = 411738.

The previous prime is 823457. The next prime is 823481. The reversal of 823478 is 874328.

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

It is a congruent number.

It is an unprimeable number.

823478 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, 205868 + ... + 205871.

It is an arithmetic number, because the mean of its divisors is an integer number (308805).

2⁸²³⁴⁷⁸ is an apocalyptic number.

823478 is a deficient number, since it is larger than the sum of its proper divisors (411742).

823478 is a wasteful number, since it uses less digits than its factorization.

823478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411741.

The product of its digits is 10752, while the sum is 32.

The square root of 823478 is about 907.4568860282. The cubic root of 823478 is about 93.7311618445.

The spelling of 823478 in words is "eight hundred twenty-three thousand, four hundred seventy-eight".