3938918 has 4 divisors (see below), whose sum is σ = 5908380. Its totient is φ = 1969458.

The previous prime is 3938903. The next prime is 3938923. The reversal of 3938918 is 8198393.

3938918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8198393 = 7 ⋅1171199.

It is a super-3 number, since 3×3938918³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 984728 + ... + 984731.

It is an arithmetic number, because the mean of its divisors is an integer number (1477095).

Almost surely, 2^3938918 is an apocalyptic number.

3938918 is a deficient number, since it is larger than the sum of its proper divisors (1969462).

3938918 is a wasteful number, since it uses less digits than its factorization.

3938918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969461.

The product of its digits is 46656, while the sum is 41.

The square root of 3938918 is about 1984.6707535508. The cubic root of 3938918 is about 157.9279434291.

The spelling of 3938918 in words is "three million, nine hundred thirty-eight thousand, nine hundred eighteen".