3993944 has 16 divisors (see below), whose sum is σ = 7564320. Its totient is φ = 1976800.

The previous prime is 3993943. The next prime is 3993949. The reversal of 3993944 is 4493993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664 + ... + 3279.

It is an arithmetic number, because the mean of its divisors is an integer number (472770).

Almost surely, 2^3993944 is an apocalyptic number.

It is an amenable number.

3993944 is a deficient number, since it is larger than the sum of its proper divisors (3570376).

3993944 is a wasteful number, since it uses less digits than its factorization.

3993944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050 (or 5046 counting only the distinct ones).

The product of its digits is 104976, while the sum is 41.

The square root of 3993944 is about 1998.4854265168. The cubic root of 3993944 is about 158.6599538938.

The spelling of 3993944 in words is "three million, nine hundred ninety-three thousand, nine hundred forty-four".