3978736 has 20 divisors (see below), whose sum is σ = 7768600. Its totient is φ = 1973952.

The previous prime is 3978727. The next prime is 3978739. The reversal of 3978736 is 6378793.

It is a junction number, because it is equal to n+sod(n) for n = 3978692 and 3978701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330 + ... + 3118.

It is an arithmetic number, because the mean of its divisors is an integer number (388430).

Almost surely, 2^3978736 is an apocalyptic number.

It is an amenable number.

3978736 is a deficient number, since it is larger than the sum of its proper divisors (3789864).

3978736 is a wasteful number, since it uses less digits than its factorization.

3978736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936 (or 1930 counting only the distinct ones).

The product of its digits is 190512, while the sum is 43.

The square root of 3978736 is about 1994.6769161947. The cubic root of 3978736 is about 158.4583178117.

The spelling of 3978736 in words is "three million, nine hundred seventy-eight thousand, seven hundred thirty-six".