3864647 has 8 divisors (see below), whose sum is σ = 3946320. Its totient is φ = 3784000.

The previous prime is 3864643. The next prime is 3864671. The reversal of 3864647 is 7464683.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3864647 - 2² = 3864643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3864647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864643) by changing a digit.

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, 15272 + ... + 15522.

It is an arithmetic number, because the mean of its divisors is an integer number (493290).

Almost surely, 2^3864647 is an apocalyptic number.

3864647 is a deficient number, since it is larger than the sum of its proper divisors (81673).

3864647 is a wasteful number, since it uses less digits than its factorization.

3864647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513.

The product of its digits is 96768, while the sum is 38.

The square root of 3864647 is about 1965.8705450767. The cubic root of 3864647 is about 156.9290252172.

The spelling of 3864647 in words is "three million, eight hundred sixty-four thousand, six hundred forty-seven".