3991358 has 16 divisors (see below), whose sum is σ = 6895584. Its totient is φ = 1697280.

The previous prime is 3991333. The next prime is 3991369. The reversal of 3991358 is 8531993.

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, 878 + ... + 2958.

It is an arithmetic number, because the mean of its divisors is an integer number (430974).

Almost surely, 2^3991358 is an apocalyptic number.

3991358 is a deficient number, since it is larger than the sum of its proper divisors (2904226).

3991358 is a wasteful number, since it uses less digits than its factorization.

3991358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227.

The product of its digits is 29160, while the sum is 38.

The square root of 3991358 is about 1997.8383317976. The cubic root of 3991358 is about 158.6257034365.

The spelling of 3991358 in words is "three million, nine hundred ninety-one thousand, three hundred fifty-eight".