3991008 has 48 divisors (see below), whose sum is σ = 11975040. Its totient is φ = 1140096.

The previous prime is 3990997. The next prime is 3991019. The reversal of 3991008 is 8001993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3990997) and next prime (3991019).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2298 + ... + 3641.

It is an arithmetic number, because the mean of its divisors is an integer number (249480).

Almost surely, 2^3991008 is an apocalyptic number.

It is an amenable number.

3991008 is an abundant number, since it is smaller than the sum of its proper divisors (7984032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3991008 is a wasteful number, since it uses less digits than its factorization.

3991008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959 (or 5951 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 3991008 is about 1997.7507352020. The cubic root of 3991008 is about 158.6210667005.

The spelling of 3991008 in words is "three million, nine hundred ninety-one thousand, eight".