3986864 has 20 divisors (see below), whose sum is σ = 8828304. Its totient is φ = 1708608.

The previous prime is 3986839. The next prime is 3986897. The reversal of 3986864 is 4686893.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a d-powerful number, because it can be written as 3¹¹ + 9² + 8⁵ + 6² + 8⁷ + 6⁸ + 4³ .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17687 + ... + 17910.

Almost surely, 2^3986864 is an apocalyptic number.

It is an amenable number.

3986864 is an abundant number, since it is smaller than the sum of its proper divisors (4841440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3986864 is a wasteful number, since it uses less digits than its factorization.

3986864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35612 (or 35606 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 3986864 is about 1996.7132993998. The cubic root of 3986864 is about 158.5661471297.

It can be divided in two parts, 39868 and 64, that multiplied together give a palindrome (2551552).

The spelling of 3986864 in words is "three million, nine hundred eighty-six thousand, eight hundred sixty-four".