3947566 has 16 divisors (see below), whose sum is σ = 6793056. Its totient is φ = 1685376.

The previous prime is 3947561. The next prime is 3947569. The reversal of 3947566 is 6657493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947561) 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, 6090 + ... + 6706.

It is an arithmetic number, because the mean of its divisors is an integer number (424566).

Almost surely, 2^3947566 is an apocalyptic number.

3947566 is a deficient number, since it is larger than the sum of its proper divisors (2845490).

3947566 is a wasteful number, since it uses less digits than its factorization.

3947566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083.

The product of its digits is 136080, while the sum is 40.

The square root of 3947566 is about 1986.8482579201. The cubic root of 3947566 is about 158.0434372907.

The spelling of 3947566 in words is "three million, nine hundred forty-seven thousand, five hundred sixty-six".