3974644 has 12 divisors (see below), whose sum is σ = 7007364. Its totient is φ = 1972544.

The previous prime is 3974623. The next prime is 3974657. The reversal of 3974644 is 4464793.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 1350244 = 1620^2 + 1162^2 .

It is a congruent number.

It is an unprimeable number.

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, 3079 + ... + 4174.

It is an arithmetic number, because the mean of its divisors is an integer number (583947).

Almost surely, 2^3974644 is an apocalyptic number.

It is an amenable number.

3974644 is a deficient number, since it is larger than the sum of its proper divisors (3032720).

3974644 is a wasteful number, since it uses less digits than its factorization.

3974644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7394 (or 7392 counting only the distinct ones).

The product of its digits is 72576, while the sum is 37.

The square root of 3974644 is about 1993.6509223031. The cubic root of 3974644 is about 158.4039761101.

It can be divided in two parts, 397 and 4644, that added together give a square (5041 = 71²).

The spelling of 3974644 in words is "three million, nine hundred seventy-four thousand, six hundred forty-four".