839945956 has 12 divisors (see below), whose sum is σ = 1479640960. Its totient is φ = 417191400.

The previous prime is 839945923. The next prime is 839945959. The reversal of 839945956 is 659549938.

It is a self number, because there is not a number n which added to its sum of digits gives 839945956.

It is not an unprimeable number, because it can be changed into a prime (839945959) 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, 694716 + ... + 695923.

Almost surely, 2^839945956 is an apocalyptic number.

It is an amenable number.

839945956 is a deficient number, since it is larger than the sum of its proper divisors (639695004).

839945956 is a wasteful number, since it uses less digits than its factorization.

839945956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390794 (or 1390792 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 58.

The square root of 839945956 is about 28981.8211298048. The cubic root of 839945956 is about 943.5185604664.

The spelling of 839945956 in words is "eight hundred thirty-nine million, nine hundred forty-five thousand, nine hundred fifty-six".