3991108 has 24 divisors (see below), whose sum is σ = 7749504. Its totient is φ = 1783200.

The previous prime is 3991103. The next prime is 3991111. The reversal of 3991108 is 8011993.

3991108 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3991108.

It is not an unprimeable number, because it can be changed into a prime (3991103) 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, 1941 + ... + 3427.

It is an arithmetic number, because the mean of its divisors is an integer number (322896).

Almost surely, 2^3991108 is an apocalyptic number.

It is an amenable number.

3991108 is a deficient number, since it is larger than the sum of its proper divisors (3758396).

3991108 is a wasteful number, since it uses less digits than its factorization.

3991108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563 (or 1561 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 3991108 is about 1997.7757631927. The cubic root of 3991108 is about 158.6223915099.

The spelling of 3991108 in words is "three million, nine hundred ninety-one thousand, one hundred eight".