823478478 has 8 divisors (see below), whose sum is σ = 1646956968. Its totient is φ = 274492824.

The previous prime is 823478459. The next prime is 823478497. The reversal of 823478478 is 874874328.

It is an interprime number because it is at equal distance from previous prime (823478459) and next prime (823478497).

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

823478478 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 823478478.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68623201 + ... + 68623212.

It is an arithmetic number, because the mean of its divisors is an integer number (205869621).

Almost surely, 2^823478478 is an apocalyptic number.

823478478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

823478478 is a wasteful number, since it uses less digits than its factorization.

823478478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137246418.

The product of its digits is 2408448, while the sum is 51.

The square root of 823478478 is about 28696.3147111262. The cubic root of 823478478 is about 937.3117998041.

The spelling of 823478478 in words is "eight hundred twenty-three million, four hundred seventy-eight thousand, four hundred seventy-eight".