847904640 has 256 divisors, whose sum is σ = 3105043200. Its totient is φ = 194641920.

The previous prime is 847904627. The next prime is 847904657. The reversal of 847904640 is 46409748.

847904640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 847904592 and 847904601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400224 + ... + 402336.

It is an arithmetic number, because the mean of its divisors is an integer number (12129075).

Almost surely, 2^847904640 is an apocalyptic number.

847904640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 847904640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552521600).

847904640 is an abundant number, since it is smaller than the sum of its proper divisors (2257138560).

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

847904640 is a wasteful number, since it uses less digits than its factorization.

847904640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165 (or 2153 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 847904640 is about 29118.8021731664. The cubic root of 847904640 is about 946.4892171089.

The spelling of 847904640 in words is "eight hundred forty-seven million, nine hundred four thousand, six hundred forty".