847940 has 12 divisors (see below), whose sum is σ = 1780716. Its totient is φ = 339168.

The previous prime is 847937. The next prime is 847949. The reversal of 847940 is 49748.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 407044 + 440896 = 638^2 + 664^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 847897 and 847906.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 847940.

It is not an unprimeable number, because it can be changed into a prime (847949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21179 + ... + 21218.

It is an arithmetic number, because the mean of its divisors is an integer number (148393).

2⁸⁴⁷⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

847940 is an abundant number, since it is smaller than the sum of its proper divisors (932776).

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

847940 is a wasteful number, since it uses less digits than its factorization.

847940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42406 (or 42404 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 847940 is about 920.8365761632. The cubic root of 847940 is about 94.6502374010.

The spelling of 847940 in words is "eight hundred forty-seven thousand, nine hundred forty".