3918831 has 16 divisors (see below), whose sum is σ = 6010368. Its totient is φ = 2224800.

The previous prime is 3918829. The next prime is 3918851. The reversal of 3918831 is 1388193.

It is not a de Polignac number, because 3918831 - 2¹ = 3918829 is a prime.

It is a super-2 number, since 2×3918831² = 30714472813122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3918792 and 3918801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3918851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3286 + ... + 4316.

It is an arithmetic number, because the mean of its divisors is an integer number (375648).

Almost surely, 2^3918831 is an apocalyptic number.

3918831 is a deficient number, since it is larger than the sum of its proper divisors (2091537).

3918831 is a wasteful number, since it uses less digits than its factorization.

3918831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222.

The product of its digits is 5184, while the sum is 33.

The square root of 3918831 is about 1979.6037482284. The cubic root of 3918831 is about 157.6590280875.

The spelling of 3918831 in words is "three million, nine hundred eighteen thousand, eight hundred thirty-one".