3947678 has 16 divisors (see below), whose sum is σ = 6951264. Its totient is φ = 1645920.

The previous prime is 3947663. The next prime is 3947693. The reversal of 3947678 is 8767493.

It is an interprime number because it is at equal distance from previous prime (3947663) and next prime (3947693).

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 7 ways as a sum of consecutive naturals, for example, 3293 + ... + 4328.

It is an arithmetic number, because the mean of its divisors is an integer number (434454).

Almost surely, 2^3947678 is an apocalyptic number.

3947678 is a deficient number, since it is larger than the sum of its proper divisors (3003586).

3947678 is a wasteful number, since it uses less digits than its factorization.

3947678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7667.

The product of its digits is 254016, while the sum is 44.

The square root of 3947678 is about 1986.8764430633. The cubic root of 3947678 is about 158.0449319415.

The spelling of 3947678 in words is "three million, nine hundred forty-seven thousand, six hundred seventy-eight".