3978616 has 16 divisors (see below), whose sum is σ = 7498440. Its totient is φ = 1979040.

The previous prime is 3978593. The next prime is 3978641. The reversal of 3978616 is 6168793.

It is a congruent number.

It is an unprimeable number.

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, 510 + ... + 2866.

Almost surely, 2^3978616 is an apocalyptic number.

It is an amenable number.

3978616 is a deficient number, since it is larger than the sum of its proper divisors (3519824).

3978616 is a wasteful number, since it uses less digits than its factorization.

3978616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2570 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 3978616 is about 1994.6468359086. The cubic root of 3978616 is about 158.4567247439.

The spelling of 3978616 in words is "three million, nine hundred seventy-eight thousand, six hundred sixteen".