3997844 has 12 divisors (see below), whose sum is σ = 7013664. Its totient is φ = 1993944.

The previous prime is 3997811. The next prime is 3997849. The reversal of 3997844 is 4487993.

3997844 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3997795 and 3997804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019 + ... + 3005.

It is an arithmetic number, because the mean of its divisors is an integer number (584472).

Almost surely, 2^3997844 is an apocalyptic number.

It is an amenable number.

3997844 is a deficient number, since it is larger than the sum of its proper divisors (3015820).

3997844 is a wasteful number, since it uses less digits than its factorization.

3997844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494 (or 2492 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 3997844 is about 1999.4609273502. The cubic root of 3997844 is about 158.7115797656.

The spelling of 3997844 in words is "three million, nine hundred ninety-seven thousand, eight hundred forty-four".