3939229978 has 8 divisors (see below), whose sum is σ = 5914470240. Its totient is φ = 1967739900.

The previous prime is 3939229963. The next prime is 3939230017. The reversal of 3939229978 is 8799229393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 934918 + ... + 939121.

It is an arithmetic number, because the mean of its divisors is an integer number (739308780).

Almost surely, 2^3939229978 is an apocalyptic number.

3939229978 is a deficient number, since it is larger than the sum of its proper divisors (1975240262).

3939229978 is a wasteful number, since it uses less digits than its factorization.

3939229978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875092.

The product of its digits is 13226976, while the sum is 61.

The square root of 3939229978 is about 62763.2852709289. The cubic root of 3939229978 is about 1579.3211282652.

The spelling of 3939229978 in words is "three billion, nine hundred thirty-nine million, two hundred twenty-nine thousand, nine hundred seventy-eight".