839931966 has 48 divisors (see below), whose sum is σ = 1854098064. Its totient is φ = 274741632.

The previous prime is 839931929. The next prime is 839931977. The reversal of 839931966 is 669139938.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352170 + ... + 354546.

It is an arithmetic number, because the mean of its divisors is an integer number (38627043).

Almost surely, 2^839931966 is an apocalyptic number.

839931966 is an abundant number, since it is smaller than the sum of its proper divisors (1014166098).

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

839931966 is a wasteful number, since it uses less digits than its factorization.

839931966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745 (or 2742 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 839931966 is about 28981.5797706060. The cubic root of 839931966 is about 943.5133220746.

The spelling of 839931966 in words is "eight hundred thirty-nine million, nine hundred thirty-one thousand, nine hundred sixty-six".