3997994 has 32 divisors (see below), whose sum is σ = 8055936. Its totient is φ = 1437120.

The previous prime is 3997993. The next prime is 3997997. The reversal of 3997994 is 4997993.

It is not an unprimeable number, because it can be changed into a prime (3997993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1004 + ... + 3000.

It is an arithmetic number, because the mean of its divisors is an integer number (251748).

Almost surely, 2^3997994 is an apocalyptic number.

3997994 is an abundant number, since it is smaller than the sum of its proper divisors (4057942).

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

3997994 is a wasteful number, since it uses less digits than its factorization.

3997994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030.

The product of its digits is 551124, while the sum is 50.

The square root of 3997994 is about 1999.4984371087. The cubic root of 3997994 is about 158.7135647054.

Subtracting 3997994 from its reverse (4997993), we obtain a palindrome (999999).

The spelling of 3997994 in words is "three million, nine hundred ninety-seven thousand, nine hundred ninety-four".