3929856678 has 48 divisors (see below), whose sum is σ = 9777643200. Its totient is φ = 1128187440.

The previous prime is 3929856607. The next prime is 3929856713. The reversal of 3929856678 is 8766589293.

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, 518548 + ... + 526071.

It is an arithmetic number, because the mean of its divisors is an integer number (203700900).

Almost surely, 2^3929856678 is an apocalyptic number.

3929856678 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3929856678 is an abundant number, since it is smaller than the sum of its proper divisors (5847786522).

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

3929856678 is a wasteful number, since it uses less digits than its factorization.

3929856678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044657 (or 1044654 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The square root of 3929856678 is about 62688.5689579847. The cubic root of 3929856678 is about 1578.0674815846.

The spelling of 3929856678 in words is "three billion, nine hundred twenty-nine million, eight hundred fifty-six thousand, six hundred seventy-eight".