3998994 has 16 divisors (see below), whose sum is σ = 8078400. Its totient is φ = 1319600.

The previous prime is 3998993. The next prime is 3998999. The reversal of 3998994 is 4998993.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3998993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2694 + ... + 3905.

It is an arithmetic number, because the mean of its divisors is an integer number (504900).

Almost surely, 2^3998994 is an apocalyptic number.

3998994 is an abundant number, since it is smaller than the sum of its proper divisors (4079406).

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

3998994 is a wasteful number, since it uses less digits than its factorization.

3998994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6705.

The product of its digits is 629856, while the sum is 51.

The square root of 3998994 is about 1999.7484841849. The cubic root of 3998994 is about 158.7267963689.

Subtracting 3998994 from its reverse (4998993), we obtain a palindrome (999999).

The spelling of 3998994 in words is "three million, nine hundred ninety-eight thousand, nine hundred ninety-four".