4000447 has 4 divisors (see below), whose sum is σ = 4364136. Its totient is φ = 3636760.

The previous prime is 4000439. The next prime is 4000489. The reversal of 4000447 is 7440004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4000447 - 2³ = 4000439 is a prime.

It is a Duffinian number.

4000447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000747) 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, 181828 + ... + 181849.

It is an arithmetic number, because the mean of its divisors is an integer number (1091034).

Almost surely, 2^4000447 is an apocalyptic number.

4000447 is a deficient number, since it is larger than the sum of its proper divisors (363689).

4000447 is a wasteful number, since it uses less digits than its factorization.

4000447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363688.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 4000447 is about 2000.1117468782. Note that the first 3 decimals coincide. The cubic root of 4000447 is about 158.7460180455.

The spelling of 4000447 in words is "four million, four hundred forty-seven", and thus it is an aban number.