4006444 has 12 divisors (see below), whose sum is σ = 7550704. Its totient is φ = 1849104.

The previous prime is 4006423. The next prime is 4006451. The reversal of 4006444 is 4446004.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38472 + ... + 38575.

Almost surely, 2^4006444 is an apocalyptic number.

It is an amenable number.

4006444 is a deficient number, since it is larger than the sum of its proper divisors (3544260).

4006444 is a wasteful number, since it uses less digits than its factorization.

4006444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77064 (or 77062 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4006444 is about 2001.6103516919. The cubic root of 4006444 is about 158.8253028985.

The spelling of 4006444 in words is "four million, six thousand, four hundred forty-four".