3994216 has 8 divisors (see below), whose sum is σ = 7489170. Its totient is φ = 1997104.

The previous prime is 3994213. The next prime is 3994223. The reversal of 3994216 is 6124993.

It can be written as a sum of positive squares in only one way, i.e., 2160900 + 1833316 = 1470^2 + 1354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3994216² = 31907522909312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3994213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249631 + ... + 249646.

Almost surely, 2^3994216 is an apocalyptic number.

It is an amenable number.

3994216 is a deficient number, since it is larger than the sum of its proper divisors (3494954).

3994216 is a wasteful number, since it uses less digits than its factorization.

3994216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499283 (or 499279 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 3994216 is about 1998.5534768927. The cubic root of 3994216 is about 158.6635555573.

The spelling of 3994216 in words is "three million, nine hundred ninety-four thousand, two hundred sixteen".