3986678 has 4 divisors (see below), whose sum is σ = 5980020. Its totient is φ = 1993338.

The previous prime is 3986677. The next prime is 3986699. The reversal of 3986678 is 8766893.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996668 + ... + 996671.

It is an arithmetic number, because the mean of its divisors is an integer number (1495005).

Almost surely, 2^3986678 is an apocalyptic number.

3986678 is a deficient number, since it is larger than the sum of its proper divisors (1993342).

3986678 is a wasteful number, since it uses less digits than its factorization.

3986678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993341.

The product of its digits is 435456, while the sum is 47.

The square root of 3986678 is about 1996.6667223150. Note that the first 3 decimals coincide. The cubic root of 3986678 is about 158.5636812181.

It can be divided in two parts, 3986 and 678, that added together give a palindrome (4664).

The spelling of 3986678 in words is "three million, nine hundred eighty-six thousand, six hundred seventy-eight".