839940 has 24 divisors (see below), whose sum is σ = 2352000. Its totient is φ = 223968.

The previous prime is 839921. The next prime is 839957. The reversal of 839940 is 49938.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 839940.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6940 + ... + 7059.

It is an arithmetic number, because the mean of its divisors is an integer number (98000).

2⁸³⁹⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

839940 is an abundant number, since it is smaller than the sum of its proper divisors (1512060).

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

839940 is a wasteful number, since it uses less digits than its factorization.

839940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14011 (or 14009 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 839940 is about 916.4824057231. The cubic root of 839940 is about 94.3516330319.

The spelling of 839940 in words is "eight hundred thirty-nine thousand, nine hundred forty".