3944865 has 16 divisors (see below), whose sum is σ = 6393600. Its totient is φ = 2076672.

The previous prime is 3944861. The next prime is 3944869. The reversal of 3944865 is 5684493.

It is an interprime number because it is at equal distance from previous prime (3944861) and next prime (3944869).

It is not a de Polignac number, because 3944865 - 2² = 3944861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3944861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480 + ... + 2849.

It is an arithmetic number, because the mean of its divisors is an integer number (399600).

Almost surely, 2^3944865 is an apocalyptic number.

It is an amenable number.

3944865 is a deficient number, since it is larger than the sum of its proper divisors (2448735).

3944865 is a wasteful number, since it uses less digits than its factorization.

3944865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416.

The product of its digits is 103680, while the sum is 39.

The square root of 3944865 is about 1986.1684218615. The cubic root of 3944865 is about 158.0073836212.

The spelling of 3944865 in words is "three million, nine hundred forty-four thousand, eight hundred sixty-five".