3978736326 has 24 divisors (see below), whose sum is σ = 8639073144. Its totient is φ = 1323402720.

The previous prime is 3978736319. The next prime is 3978736343. The reversal of 3978736326 is 6236378793.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 228255 + ... + 245066.

It is an arithmetic number, because the mean of its divisors is an integer number (359961381).

Almost surely, 2^3978736326 is an apocalyptic number.

3978736326 is an abundant number, since it is smaller than the sum of its proper divisors (4660336818).

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

3978736326 is a wasteful number, since it uses less digits than its factorization.

3978736326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473796 (or 473793 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 54.

The square root of 3978736326 is about 63077.2250974946. The cubic root of 3978736326 is about 1584.5832213951.

The spelling of 3978736326 in words is "three billion, nine hundred seventy-eight million, seven hundred thirty-six thousand, three hundred twenty-six".