3984865 has 8 divisors (see below), whose sum is σ = 4989888. Its totient is φ = 3049200.

The previous prime is 3984859. The next prime is 3984917. The reversal of 3984865 is 5684893.

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

It is not a de Polignac number, because 3984865 - 2¹⁷ = 3853793 is a prime.

It is a Duffinian 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, 17211 + ... + 17440.

It is an arithmetic number, because the mean of its divisors is an integer number (623736).

Almost surely, 2^3984865 is an apocalyptic number.

It is an amenable number.

3984865 is a deficient number, since it is larger than the sum of its proper divisors (1005023).

3984865 is a wasteful number, since it uses less digits than its factorization.

3984865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34679.

The product of its digits is 207360, while the sum is 43.

The square root of 3984865 is about 1996.2126640215. The cubic root of 3984865 is about 158.5396411909.

The spelling of 3984865 in words is "three million, nine hundred eighty-four thousand, eight hundred sixty-five".