847808 has 28 divisors (see below), whose sum is σ = 1813560. Its totient is φ = 390912.

The previous prime is 847789. The next prime is 847813. The reversal of 847808 is 808748.

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 847808.

It is an unprimeable number.

847808 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323 + ... + 1341.

It is an arithmetic number, because the mean of its divisors is an integer number (64770).

2⁸⁴⁷⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 847808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906780).

847808 is an abundant number, since it is smaller than the sum of its proper divisors (965752).

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

847808 is a wasteful number, since it uses less digits than its factorization.

847808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 847808 is about 920.7648994179. The cubic root of 847808 is about 94.6453257014.

Subtracting from 847808 its reverse (808748), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 847808 in words is "eight hundred forty-seven thousand, eight hundred eight".