3991674 has 8 divisors (see below), whose sum is σ = 7983360. Its totient is φ = 1330556.

The previous prime is 3991667. The next prime is 3991679. The reversal of 3991674 is 4761993.

It is a sphenic number, since it is the product of 3 distinct primes.

3991674 is an admirable number.

It is a super-2 number, since 2×3991674² = 31866922644552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3991679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332634 + ... + 332645.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^3991674 is an apocalyptic number.

3991674 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.

3991674 is a wasteful number, since it uses less digits than its factorization.

3991674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665284.

The product of its digits is 40824, while the sum is 39.

The square root of 3991674 is about 1997.9174157107. The cubic root of 3991674 is about 158.6298895138.

It can be divided in two parts, 399167 and 4, that added together give a triangular number (399171 = T₈₉₃).

The spelling of 3991674 in words is "three million, nine hundred ninety-one thousand, six hundred seventy-four".