3947318 has 8 divisors (see below), whose sum is σ = 5982312. Its totient is φ = 1953216.

The previous prime is 3947311. The next prime is 3947327. The reversal of 3947318 is 8137493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9980 + ... + 10367.

It is an arithmetic number, because the mean of its divisors is an integer number (747789).

Almost surely, 2^3947318 is an apocalyptic number.

3947318 is a deficient number, since it is larger than the sum of its proper divisors (2034994).

3947318 is a wasteful number, since it uses less digits than its factorization.

3947318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20446.

The product of its digits is 18144, while the sum is 35.

The square root of 3947318 is about 1986.7858465371. The cubic root of 3947318 is about 158.0401276063.

The spelling of 3947318 in words is "three million, nine hundred forty-seven thousand, three hundred eighteen".