3997918 has 16 divisors (see below), whose sum is σ = 6153840. Its totient is φ = 1947456.

The previous prime is 3997909. The next prime is 3997919. The reversal of 3997918 is 8197993.

3997918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20196 + ... + 20392.

It is an arithmetic number, because the mean of its divisors is an integer number (384615).

Almost surely, 2^3997918 is an apocalyptic number.

3997918 is a deficient number, since it is larger than the sum of its proper divisors (2155922).

3997918 is a wasteful number, since it uses less digits than its factorization.

3997918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its digits is 122472, while the sum is 46.

The square root of 3997918 is about 1999.4794322523. The cubic root of 3997918 is about 158.7125590088.

The spelling of 3997918 in words is "three million, nine hundred ninety-seven thousand, nine hundred eighteen".