3994218 has 64 divisors (see below), whose sum is σ = 9936000. Its totient is φ = 1181952.

The previous prime is 3994213. The next prime is 3994223. The reversal of 3994218 is 8124993.

It is an interprime number because it is at equal distance from previous prime (3994213) and next prime (3994223).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3994213) 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 31 ways as a sum of consecutive naturals, for example, 17328 + ... + 17556.

It is an arithmetic number, because the mean of its divisors is an integer number (155250).

Almost surely, 2^3994218 is an apocalyptic number.

3994218 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3994218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4968000).

3994218 is an abundant number, since it is smaller than the sum of its proper divisors (5941782).

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

3994218 is a wasteful number, since it uses less digits than its factorization.

3994218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 270 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 3994218 is about 1998.5539772546. The cubic root of 3994218 is about 158.6635820395.

The spelling of 3994218 in words is "three million, nine hundred ninety-four thousand, two hundred eighteen".