822478 has 8 divisors (see below), whose sum is σ = 1240200. Its totient is φ = 409080.

The previous prime is 822433. The next prime is 822517. The reversal of 822478 is 874228.

822478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

822478 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 in 3 ways as a sum of consecutive naturals, for example, 553 + ... + 1396.

It is an arithmetic number, because the mean of its divisors is an integer number (155025).

2⁸²²⁴⁷⁸ is an apocalyptic number.

822478 is a deficient number, since it is larger than the sum of its proper divisors (417722).

822478 is a wasteful number, since it uses less digits than its factorization.

822478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162.

The product of its digits is 7168, while the sum is 31.

The square root of 822478 is about 906.9057282871. The cubic root of 822478 is about 93.6932053039.

The spelling of 822478 in words is "eight hundred twenty-two thousand, four hundred seventy-eight".