3994641 has 24 divisors (see below), whose sum is σ = 6651840. Its totient is φ = 2262816.

The previous prime is 3994621. The next prime is 3994681. The reversal of 3994641 is 1464993.

3994641 is a `hidden beast` number, since 3 + 9 + 9 + 4 + 641 = 666.

3994641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3994641 - 2⁷ = 3994513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3994596 and 3994605.

It is not an unprimeable number, because it can be changed into a prime (3994621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10075 + ... + 10463.

It is an arithmetic number, because the mean of its divisors is an integer number (277160).

Almost surely, 2^3994641 is an apocalyptic number.

It is an amenable number.

3994641 is a deficient number, since it is larger than the sum of its proper divisors (2657199).

3994641 is a wasteful number, since it uses less digits than its factorization.

3994641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 562 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 3994641 is about 1998.6598009666. The cubic root of 3994641 is about 158.6691828293.

The spelling of 3994641 in words is "three million, nine hundred ninety-four thousand, six hundred forty-one".