3944643 has 8 divisors (see below), whose sum is σ = 5277888. Its totient is φ = 2620584.

The previous prime is 3944627. The next prime is 3944669. The reversal of 3944643 is 3464493.

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

It is not a de Polignac number, because 3944643 - 2⁴ = 3944627 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (3944683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221 + ... + 3062.

It is an arithmetic number, because the mean of its divisors is an integer number (659736).

Almost surely, 2^3944643 is an apocalyptic number.

3944643 is a deficient number, since it is larger than the sum of its proper divisors (1333245).

3944643 is a wasteful number, since it uses less digits than its factorization.

3944643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593.

The product of its digits is 31104, while the sum is 33.

The square root of 3944643 is about 1986.1125345760. The cubic root of 3944643 is about 158.0044195741.

The spelling of 3944643 in words is "three million, nine hundred forty-four thousand, six hundred forty-three".