3991652 has 12 divisors (see below), whose sum is σ = 7983360. Its totient is φ = 1710696.

The previous prime is 3991649. The next prime is 3991667. The reversal of 3991652 is 2561993.

3991652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

3991652 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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 in 3 ways as a sum of consecutive naturals, for example, 71252 + ... + 71307.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^3991652 is an apocalyptic number.

It is an amenable number.

3991652 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3991652 is a wasteful number, since it uses less digits than its factorization.

3991652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142570 (or 142568 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 3991652 is about 1997.9119099700. The cubic root of 3991652 is about 158.6295980852.

The spelling of 3991652 in words is "three million, nine hundred ninety-one thousand, six hundred fifty-two".