3967918 has 8 divisors (see below), whose sum is σ = 5960448. Its totient is φ = 1981104.

The previous prime is 3967913. The next prime is 3967961. The reversal of 3967918 is 8197693.

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 (3967913) 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, 1555 + ... + 3217.

It is an arithmetic number, because the mean of its divisors is an integer number (745056).

Almost surely, 2^3967918 is an apocalyptic number.

3967918 is a deficient number, since it is larger than the sum of its proper divisors (1992530).

3967918 is a wasteful number, since it uses less digits than its factorization.

3967918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858.

The product of its digits is 81648, while the sum is 43.

The square root of 3967918 is about 1991.9633530766. The cubic root of 3967918 is about 158.3145738316.

The spelling of 3967918 in words is "three million, nine hundred sixty-seven thousand, nine hundred eighteen".