3985678 has 4 divisors (see below), whose sum is σ = 5978520. Its totient is φ = 1992838.

The previous prime is 3985669. The next prime is 3985697. The reversal of 3985678 is 8765893.

3985678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8765893 = 241 ⋅36373.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996418 + ... + 996421.

It is an arithmetic number, because the mean of its divisors is an integer number (1494630).

Almost surely, 2^3985678 is an apocalyptic number.

3985678 is a deficient number, since it is larger than the sum of its proper divisors (1992842).

3985678 is a wasteful number, since it uses less digits than its factorization.

3985678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992841.

The product of its digits is 362880, while the sum is 46.

The square root of 3985678 is about 1996.4162892543. The cubic root of 3985678 is about 158.5504223143.

The spelling of 3985678 in words is "three million, nine hundred eighty-five thousand, six hundred seventy-eight".